Hamilton Township, Warren County

Township · Warren County · 26,276 residents

Warren County

Local events in Hamilton Township, Warren County

3 events in the next 90 days from 1 public calendar. All local events in Hamilton Township, Warren County

  1. Trick-or-Treat

    6 to 8 p.m. · Township Wide · From Hamilton Township

  2. Wreaths Across America

    Noon to 1 p.m. · From Hamilton Township

Checked October 20; the events page is refreshed daily.

How Hamilton Township, Warren County began

Hamilton Township was organized on May 10, 1803, as one of Warren County's four original townships, and like many Ohio townships of the era it was named for Alexander Hamilton. It sits in the south-central part of the county along the Little Miami River, and its history runs through the river valley: Butterworth Station, built in 1820, served as both an Underground Railroad stop and a later Little Miami Railroad depot, and by the late 1800s the Peters Cartridge Company had built one of the nation's leading ammunition plants on the riverbank, supplying both World Wars before closing. The old rail corridor is now the Little Miami Scenic Trail, and the village of Maineville sits near the township's center alongside smaller communities such as Zoar, Cozaddale, and Fosters.

Settled October 1795 (Mounts' Station, probably the first settlement in the county south of the Little Miami), incorporated May 10, 1803 (one of the four original townships), by William Mounts and five other families at Mounts' Station.

Where the name comes from

The township was named for Alexander Hamilton, the same namesake used by several other Ohio townships (in Franklin, Jackson, and Lawrence counties, among others); no source gives a more specific local reason for the choice.

Before the town

Hamilton Township holds two of Warren County's most significant prehistoric sites, both near Morrow. Stubbs Earthworks is an Ohio Hopewell ceremonial center built beginning around 100 BCE and abandoned by about 500 CE: an earthen enclosure of circular and rectangular elements, a separate smaller circle, and a large timber circle 240 feet across built of 172 posts, radiocarbon-dated to AD 200-300, that was uncovered in a 2005 excavation by archaeologist Frank Cowan. Charles Whittlesey mapped the site in 1851; much of it was destroyed when Little Miami High School was built over part of it in 2000, though sections survive on the school grounds and it has been listed on the National Register of Historic Places since 1978. A few miles away, the Moar Mound and Village site (NRHP-listed 1976) pairs a well-preserved burial mound with an adjacent Late Woodland village; excavations there recovered multiple human burials and a range of grave goods, and the two contributing properties are considered directly associated with a single settlement. Beyond these prehistoric sites, no source found documents a historic-era (1700s) Native village, trail, or treaty line specific to Hamilton Township by name; the township lies within land ceded at the Treaty of Greenville (1795) that had been Shawnee and Miami territory before Ohio statehood.

Nations recorded here: Hopewell culture, Shawnee, Miami.

  • Stubbs Earthworks (earthwork) — Morrow, Hamilton Township, on and near the campus of Little Miami High School, Ohio Hopewell, c. 100 BCE - AD 500 (timber circle radiocarbon-dated AD 200-300) (en.wikipedia.org)
  • Moar Mound and Village (mound) — west of Morrow, Hamilton Township, Late Woodland (en.wikipedia.org)

Timeline

  1. — Ohio Hopewell people build the Stubbs Earthworks near Morrow, an enclosure complex that comes to include a 240-foot timber circle of 172 posts, radiocarbon-dated to AD 200-300.
  2. — Lieut. William McGuire enters Virginia Military warrant No. 520, 1,000 acres in the northeast of the township, on August 21; it is surveyed by Nathaniel Massie in January 1793, and the whole township lies in the Virginia Military lands.
  3. — William Mounts and five other families, including Thomas Forsha and Thomas Leonard, settle in October on land bought from Robert Todd and build cabins in a circle around a spring at Mounts' Station, probably the first settlement south of the Little Miami.
  4. — Theophilus Simonton, from North Carolina, settles in the fall near the Clermont County line, the first settler in the south; Joseph Hill follows in 1797, Samuel Hill in 1799 and Philip and Benjamin Hill in 1800.
  5. — The Peters Cartridge Company builds an ammunition factory in the township on the Little Miami River; it becomes one of the nation's leading cartridge manufacturers and supplies U.S. forces through both World Wars.
  6. — Hamilton Township is organized on May 10 as one of the four original townships of newly created Warren County.
  7. — Peter Wilson, backed by Gen. Lytle, sinks wells at salty springs half a mile south of Maineville about 1803 or 1804 and builds a furnace and kettles to make salt, the settlers' alternative to long trips for the barrel of salt.
  8. — On June 24 the eastern part of Hamilton Township is cut off to form Salem Township; the boundary is adjusted again on June 8, 1818, leaving a rectangle of about 36 square miles.
  9. — Settlers from Maine begin to arrive at the future Maineville, where Carr, a blacksmith famous for his axes, builds the first log house; Moses Dudley builds the first frame house and Dr. John Cottle builds the first brick house in 1821.
  10. — Butterworth Station is built along the Little Miami River, later serving as a stop on both the Underground Railroad and the Little Miami Railroad.
  11. — The first post office in the township opens at Hopkinsville; others follow at Dallasburg in 1848, Maineville in 1854, Foster's Crossing in 1859, Murdoch in 1866 and Cozaddale in 1871.
  12. — Maineville, the only incorporated village in the township, is incorporated; the first village election is held April 25, 1850, with Silas Dudley as first mayor.
  13. — Hoppe's Island and Loveland Park become popular riverside resort destinations reached by train along the Little Miami.

Stories

An ammunition town on the Little Miami

By the closing years of the nineteenth century the Peters Cartridge Company had built a sprawling factory complex on the Little Miami River in Hamilton Township, at what is now the Kings Mills/South Lebanon area of the river valley. The plant became one of the country's leading ammunition manufacturers, and through both World War I and World War II it supplied cartridges to American forces, employing large numbers of local residents including many women during wartime labor shortages. After the company's closure the riverside factory buildings stood for decades before being redeveloped for residential and commercial use, and the rail line that once served the plant became the Little Miami Scenic Trail, a bicycle and pedestrian corridor that now carries recreational traffic where freight once ran.

Mounts' Station

In October 1795, just two months after the Treaty of Greenville ended the Indian war, William Mounts, his wife and six children, and five other families, including Thomas Forsha and Thomas Leonard, built their cabins in a circle around a spring on land bought from Robert Todd and called their settlement Mounts' Station. Tradition holds it the very first settlement in the county south of the Little Miami. For another year they were alone: Theophilus Simonton, who came from North Carolina in the fall of 1796 to the southern end of the township, had no neighbors within the present limits except those at the Station. Many Virginians holding land warrants for the township had earlier come down the Ohio but found the Indians too hostile to settle, and had waited at Columbia and White's Station near Cincinnati.

Photographs

The former Peters Cartridge Factory complex in Hamilton Township, Warren County
The former Peters Cartridge Factory complex in Hamilton Township, Warren County (2014)
Photo: Ohio Historic Preservation Tax Credit program, via Wikimedia Commons, CC BY 2.0 · Wikimedia Commons

Local history sources: en.wikipedia.org · housetrends.com · en.wikipedia.org · en.wikipedia.org · commons.wikimedia.org · commons.wikimedia.org · en.wikipedia.org · en.wikipedia.org · archive.org

Water

17 groundwater wells drawing from the Little Miami River buried valley (sand-and-gravel) aquifer along the river near Maineville, in southern Warren County The water here

  • Warren County76% of residentsWells in the Little Miami and Great Miami river valley aquifers
  • Western Water Company12% of residentsLittle Miami River valley wells (51%) plus Cincinnati Ohio River water (49%)
  • Clermont Public Water System4% of residentsWilliam H. Harsha Lake plus wells in the Little Miami River and Ohio River aquifers
  • Morrow Village3% of residentsGroundwater wells (3 wells)
  • Loveland City2% of residentsLocal wells (Betty Ray well field, sand & gravel aquifer)
  • South Lebanon City1% of residentsOhio River (Miller Plant, ~88%) plus Great Miami Buried Valley Aquifer wells (~12%)
  • Cincinnati Public Water System1% of residentsOhio River (Miller Plant, ~88%) plus Great Miami Buried Valley Aquifer wells (~12%)
  • Warren Co. Socialville1% of residentsOhio River (Miller Plant, ~88%) plus Great Miami Buried Valley Aquifer wells (~12%)

Hospitals, fire stations and more

Inside Hamilton Township, Warren County's boundary: 1 nursing home, 2 fire and EMS stations, 2 high-hazard dams, 3 public schools, 1 private school, 5 poor-rated bridges, 1 public charging site, 2 Superfund sites, 1 Toxics Release Inventory facility and 7 spill cases. Press a pin or a name for its whole record and its source.

Nursing homes (1)

  1. Otterbein at Maineville3 of 5 stars · Maineville
    Address
    201 Marge Schott Way, Maineville, OH 45039
    Certified beds
    60
    Residents on an average day
    53
    Medicare overall rating
    3 of 5 stars
    Health inspections
    3 of 5 stars
    Staffing
    4 of 5 stars
    Quality measures
    4 of 5 stars
    Penalties since 2023
    3 fines totalling $43,514 (latest 2025-04-03)
    Ownership
    Non profit - Corporation
    Chain
    OTTERBEIN SENIORLIFE
    Takes
    Medicare and Medicaid
    Phone
    (513) 309-5650
    Medicare ID
    366393
    Map point
    the ZIP's center (the address did not geocode)

Source: CMS Care Compare nursing home provider and penalties files; Medicare star ratings run 1 to 5.

Fire and EMS stations (2)

  1. Hamilton Township Fire and Rescue Station 76Maineville
    Address
    7684 South State Highway 48, Maineville, OH 45039
    Coordinates
    39.32312, -84.21988
  2. Hamilton Township Fire and Rescue Station 77Morrow
    Address
    2000 East US Highway 22, Morrow, OH 45152
    Coordinates
    39.35621, -84.17691

Source: USGS National Map structures (most Ohio records last updated 2019 to 2022), checked against the Columbus and Cleveland station lists. The department that answers a call is set by jurisdiction and mutual aid, not by distance.

High-hazard dams (2)

  1. Classicway Farm Lake Dam PoorTributary To Little Miami River · condition: poor
    Hazard class
    High: a failure would probably cost a life
    Condition
    Poor (assessed 04/18/2019)
    River or stream
    Tributary To Little Miami River
    Purpose
    Recreation
    Type
    Earth
    Height
    24 ft
    Storage
    73 acre-feet
    Completed
    1965
    Owner type
    Private
    County
    Warren County
    Nearest town (NID)
    South Lebanon
    Last inspection
    05/01/2024
    Emergency action plan
    No
    NID ID
    OH00532
  2. Sunrise Lake DamTributary To Bear Run · condition: satisfactory
    Hazard class
    High: a failure would probably cost a life
    Condition
    Satisfactory (assessed 02/17/2025)
    River or stream
    Tributary To Bear Run
    Purpose
    Recreation
    Type
    Earth
    Height
    54 ft
    Storage
    257 acre-feet
    Completed
    1931
    Owner type
    Private
    County
    Warren County
    Nearest town (NID)
    Foster
    Last inspection
    05/01/2024
    Emergency action plan
    Yes
    NID ID
    OH00533

Source: U.S. Army Corps of Engineers National Inventory of Dams, August 2026. "High hazard" rates what a failure would cost downstream, not how likely one is; the condition is the state's assessment.

Public schools (3)

  1. Little Miami High School4.5 of 5 stars · Morrow
    Address
    3001 E US 22-3, Morrow, OH 45152
    School district
    Little Miami Local School District
    Kind (NCES)
    Regular School
    Students, 2023-24
    1,519
    Teachers (full-time equivalent)
    76.26
    Report card, 2025-26
    4.5 of 5 stars
    Performance index
    85.6%
    Four-year graduation rate
    97.5%
    Ohio building IRN
    021113
    NCES school ID
    390504403948
  2. Little Miami Middle School4.5 of 5 stars · Morrow
    Address
    5290 Morrow Cozaddale Rd, Morrow, OH 45152
    School district
    Little Miami Local School District
    Kind (NCES)
    Regular School
    Students, 2023-24
    1,312
    Teachers (full-time equivalent)
    58.54
    Report card, 2025-26
    4.5 of 5 stars
    Performance index
    81.9%
    Ohio building IRN
    021121
    NCES school ID
    390504404302
  3. Little Miami Primary School4 of 5 stars · Maineville
    Address
    7247 Zoar Rd, Maineville, OH 45039
    School district
    Little Miami Local School District
    Kind (NCES)
    Regular School
    Students, 2023-24
    886
    Teachers (full-time equivalent)
    39.2
    Report card, 2025-26
    4 of 5 stars
    Performance index
    84%
    Ohio building IRN
    009927
    NCES school ID
    390504405492

Source: NCES EDGE public school locations 2024-25 and Common Core of Data 2023-24 (type, students, teachers); Ohio School Report Cards 2025-26 (Department of Education and Workforce), matched by name within the district.

Private schools (1)

  1. Kings Point Christian AcademyPrivate, conservative Christian · Maineville
    Address
    5600 S State Route 48, Maineville, OH 45039
    Kind
    conservative Christian
    Students, 2023-24
    9
    Teachers (full-time equivalent)
    2
    Students per teacher
    4.5
    Phone
    (513) 494-1896
    NCES private school ID
    A2390417

Source: NCES Private School Survey 2023-24.

Bridges rated poor (5)

  1. Grog Run Road over Grog RunPoor · built 1978
    Condition
    Poor: a deck, superstructure, substructure or culvert rated 4 or below on the 0 to 9 scale
    What it is
    Bridge
    Built
    1978
    Length
    12 ft
    Owner
    County
    Vehicles a day
    351
    Coordinates
    39.27349, -84.21350
  2. Morrow-Cozaddale over Big Foot RunPoor · built 1977
    Condition
    Poor: a deck, superstructure, substructure or culvert rated 4 or below on the 0 to 9 scale
    What it is
    Bridge
    Built
    1977
    Length
    17 ft
    Owner
    County
    Vehicles a day
    2,437
    Coordinates
    39.35341, -84.16311
  3. Morrow-Cozaddale over Branch of Big Foot RunPoor · built 1932
    Condition
    Poor: a deck, superstructure, substructure or culvert rated 4 or below on the 0 to 9 scale
    What it is
    Bridge
    Built
    1932
    Length
    8 ft
    Owner
    County
    Vehicles a day
    2,215
    Coordinates
    39.34852, -84.16017
  4. Stephens Road over Br. of Bear RunPoor · built 1993
    Condition
    Poor: a deck, superstructure, substructure or culvert rated 4 or below on the 0 to 9 scale
    What it is
    Bridge
    Built
    1993
    Length
    15 ft
    Owner
    County
    Vehicles a day
    2,227
    Coordinates
    39.32660, -84.20340
  5. US 22 over Bear RunPoor · built 1938
    Condition
    Poor: a deck, superstructure, substructure or culvert rated 4 or below on the 0 to 9 scale
    What it is
    Bridge
    Built
    1938
    Length
    20 ft
    Owner
    State
    Vehicles a day
    16,452
    Coordinates
    39.32425, -84.24619

Source: FHWA National Bridge Inventory 2025. "Poor" means one major part rated 4 or below on the 0 to 9 scale; it calls for repair, not closing, unless the state posts or closes the bridge.

Public EV charging (1)

  1. Alexander Pointe - Building 22 Level 2 · Maineville
    Address
    535 Willow Pond Blvd, Maineville, OH 45039
    Ports
    2 Level 2
    Plugs
    J1772
    Network
    FLO
    Hours
    24 hours daily
    Phone
    888-356-8911

Source: NREL Alternative Fuels Data Center station list (May 2026), public and open stations, the posts at one address counted as one site.

Superfund sites (2)

  1. Kings Mills Military ReservationSuperfund program · Hamilton Township
    Address
    6195 Striker Road, Hamilton Township, OH 45034
    County
    Warren County
    Status
    Superfund program site, not on the National Priorities List
    Federal facility
    Yes
    EPA program ID
    OH0001117878
    EPA registry ID
    110009304092
  2. Striker Road Drum SiteSuperfund program · Maineville
    Address
    6451 Striker Rd, Maineville, OH 45039
    County
    Warren County
    Status
    Superfund program site, not on the National Priorities List
    EPA program ID
    OHN000510083
    EPA registry ID
    110000617333

Source: EPA Facility Registry Service, Superfund (SEMS) and National Priorities List sites. Many program sites were assessed and needed no cleanup.

Facilities reporting toxic releases (1)

  1. Sumco Phoenix CorpToxics Release Inventory · Maineville
    Address
    537 Grandin Rd, Maineville, OH 45039
    County
    Warren County
    Status
    Reports to the Toxics Release Inventory (active)
    EPA program ID
    45039CNCNN537GR
    EPA registry ID
    110000392423

Source: EPA Facility Registry Service, Toxics Release Inventory reporters. Reporting a release is required of large users of listed chemicals; it is not by itself a violation.

Spills reported since 2021 (7)

  1. Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road)2025-08-23 · Miami Twp
    Reported
    2025-08-23
    What spilled
    Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road)
    Largest amount reported
    9 gallons
    Where
    Miami Twp, Miami County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2508EPA0001437
  2. Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road)2025-03-17 · Hamilton Twp
    Reported
    2025-03-17
    What spilled
    Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road)
    Largest amount reported
    25 gallons
    Where
    Hamilton Twp, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2503EPA0000382
  3. Paint Nos / Lacquer (Not Specified)2024-12-20 · Hamilton Twp
    Reported
    2024-12-20
    What spilled
    Paint Nos / Lacquer (Not Specified)
    Largest amount reported
    5 gallons
    Where
    Hamilton Twp, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2412EPA0002047
  4. Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road) Reached water2024-03-08 · Hamilton Twp
    Reported
    2024-03-08
    What spilled
    Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road)
    Reached a waterway
    99 - Unnamed
    Where
    Hamilton Twp, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2403EPA0000373
  5. Oil Hydraulic Fluid(S) Reached water2023-04-20 · Hamilton Twp
    Reported
    2023-04-20
    What spilled
    Oil Hydraulic Fluid(S)
    Reached a waterway
    Unnamed
    Where
    Hamilton Twp, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2304EPA0000635
  6. Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road)2023-02-22 · Hamilton Twp
    Reported
    2023-02-22
    What spilled
    Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road)
    Largest amount reported
    15 gallons
    Where
    Hamilton Twp, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2302EPA0000274
  7. Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road)2022-08-18 · Hamilton Twp
    Reported
    2022-08-18
    What spilled
    Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road)
    Largest amount reported
    75 gallons
    Where
    Hamilton Twp, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2208EPA0001257

Source: Ohio EPA emergency response spill reports, 2021 to September 2026, one point per case where Ohio EPA placed it. A report is what the caller or responder recorded; amounts are often blank or estimated.

Its ZIP codes

Each ZIP code that touches Hamilton Township, Warren County, with the share of its residents who live here and the same headline figures as the ZIP page.

The ZIP codes serving Hamilton Township, Warren County
ZIPShareWaterRadon Home valueSchoolsFlood
45039 Hamilton Township and Maineville 65% 17 groundwater wells drawing from the Little Miami River buried valley (sand-and-gravel) aquifer along the river near Maineville, in southern Warren County 4.4 pCi/L average radon Appraisal records without year built Little Miami Local · 4.5 stars overall 3.2% of residents in the 1% floodplain
45152 Hamilton Township and Morrow 45% Ohio River intake at the plant's riverfront on Kellogg Ave in the California neighborhood, east Cincinnati 5.9 pCi/L average radon Appraisal records without year built Little Miami Local · 4.5 stars overall 7.4% of residents in the 1% floodplain
45140 Miami Township and Loveland 3% Five wells in the sand-and-gravel aquifer of the Little Miami River valley at Miamiville, Miami Township 4.2 pCi/L average radon Median year built 1990 Loveland City · 5 stars overall 0.4% of residents in the 1% floodplain
45122 Goshen Township and Goshen 2% Five wells in the sand-and-gravel aquifer of the Little Miami River valley at Miamiville, Miami Township 4.0 pCi/L average radon Median year built 1977 Goshen Local · 5 stars overall 0.4% of residents in the 1% floodplain
45065 South Lebanon 2% Ohio River intake at the plant's riverfront on Kellogg Ave in the California neighborhood, east Cincinnati 3.5 pCi/L average radon Appraisal records without year built Kings Local · 4.5 stars overall 7.6% of residents in the 1% floodplain

Local government

Who holds office in Hamilton Township, Warren County, how its elections and ballot issues came out, and the state auditor's record.

Money issues on the ballot since 2018: 2 of 2 passed.

Ballot issues

DateIssueForAgainstResult
2018-11-06 Issue 8: 8 Hamilton Twp Tax Levy Police 8,6943,013Passed (74.26% for)
2018-11-06 Issue 9: 9 Hamilton Twp Tax Levy Streets 6,8644,827Passed (58.71% for)
2015-11-03 Issue 5: 5 Hamilton Twp Police Renewal 1 mill 5,6062,131Passed (72.46% for)

Elections for office

DateOfficeCandidates and votes
2017-11-07 Township Trustees Joe Rozzi 2,975, 28.23%; Darryl Cordrey 2,110, 20.02%; David Wallace 1,775, 16.84%; Nathan Myers 1,485, 14.09%; Kim Lukens 1,280, 12.15%; Cadi Kelly 595, 5.65%; Roxan Tarnowski 319, 3.03%
2015-11-03 Township Trustee Joe Walker 3,220, 47.35%; Gene Duvelius 2,511, 36.93%; Joshua Bibee 1,069, 15.72%
2015-11-03 Fiscal Officer James D. Hunter 3,711, 58.82%; Russell Holman 2,598, 41.18%

Winners in bold. Results from the county board of elections' official canvass unless marked.

Auditor of State record

Quick answers

What county is Hamilton Township, Ohio in?

Hamilton Township, Warren County is a township in Warren County, Ohio, with 26,276 residents.

When was Hamilton Township, Ohio founded?

Hamilton Township, Warren County was settled October 1795 (Mounts' Station, probably the first settlement in the county south of the Little Miami); incorporated May 10, 1803 (one of the four original townships). Founders on record: William Mounts and five other families at Mounts' Station. Source

How did Hamilton Township, Ohio get its name?

The township was named for Alexander Hamilton, the same namesake used by several other Ohio townships (in Franklin, Jackson, and Lawrence counties, among others); no source gives a more specific local reason for the choice. Source

What ZIP code is Hamilton Township, Ohio?

Hamilton Township, Warren County is served by ZIP codes 45039, 45152, 45140 and 45122; 45039 holds the largest share of its residents.

Where does Hamilton Township, Ohio get its water?

The main water source for Hamilton Township, Warren County (Warren County): 17 groundwater wells drawing from the Little Miami River buried valley (sand-and-gravel) aquifer along the river near Maineville, in southern Warren County.

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