County

Montgomery County, Ohio

Ohio · 539,598 residents (July 2025 estimate) · 33 ZIP codes · 27 cities, villages and townships

539,598 people (July 2025 estimate), +0.4% since the 2020 census; life expectancy 73.3 years; median household income $66,349 (2024). The county in numbers

Montgomery County, Ohio

Montgomery County in numbers

The public records that are kept county by county, in 22 blocks. Every figure names its source; a tile's small line gives the comparison or the date.

Population

How many people live here, how the count has moved since 2020 and since 1900, and how the USDA classes the county.

residents, July 2025 estimate
539,598
Census Bureau vintage 2025
since the April 2020 census
+0.4%
537,304 counted in 2020
births since April 2020
30,464
deaths since April 2020
34,529
net migration since April 2020
+6,443
people who moved in, minus people who moved out
net domestic migration, 2025
+1,659
moved in from elsewhere in the U.S., minus moved out
net international migration, 2025
+1,224

Montgomery County peaked at 606,148 people in 1970.

It is 4.1 times its 1900 size.

USDA rural-urban continuum code 2 of 9 (1 is the most metropolitan): metro - counties in metro areas of 250,000 to 1 million population.

USDA ERS county typology (2015 codes): a metro county with a nonspecialized economy, flagged for population loss.

Montgomery County population by census year (Census Bureau)
YearPeopleSource
18107,722first census that counted the county
185038,218decennial census
1900130,146decennial census
1950398,441decennial census
1970606,148decennial census
2000559,141decennial census
2020537,304decennial census
2025539,598July estimate

Source: Census Bureau Population Estimates Program (vintage 2025, join_popest.py); decennial counts 1900-1990 from 'Population of States and Counties of the United States 1790-1990', 2000/2010 from intercensal files; USDA ERS Rural-Urban Continuum Codes, 2023; USDA ERS county typology codes, 2015 edition · Census population estimates · USDA ERS county codes · USDA ERS county typology · About this topic

Moving in and out

Households that changed county between the tax returns they filed in 2022 and 2023, counted by the IRS.

households moved in, 2022 to 2023
21,282
tax returns filed from a new county
households moved out
21,649
net households
-367
moved in, minus moved out
households stayed put
401,270
Where arriving households came from (IRS returns, 2022 to 2023)
FromHouseholds
Greene, OH3,549
Warren, OH1,621
Butler, OH1,216
Where leaving households went (IRS returns, 2022 to 2023)
ToHouseholds
Greene, OH3,690
Warren, OH1,801
Miami, OH1,541

Source: IRS Statistics of Income county-to-county migration flows, 2022-2023 · IRS migration data · About this topic

Income and poverty

The Census Bureau's 2024 small-area estimates for the county.

of residents below the poverty line, 2024
14.4%
of children below the poverty line, 2024
20.2%
median household income, 2024
$66,349

Source: Census SAIPE 2024 county estimates · Census SAIPE · About this topic

Jobs and wages

Unemployment in the latest month and what employers in the county pay, from the Bureau of Labor Statistics.

unemployment rate, July 2026
3.7%
5.3% a year earlier
people in the labor force, July 2026
258,595
looking for work
9,696
average weekly wage, first quarter of 2026
$1,279
+1.9% on the year
jobs covered by unemployment insurance
249,311
+0.2% on the year
establishments
13,136
Largest private sectors, first quarter of 2026 (BLS QCEW)
SectorJobsAverage weekly wage
health care and social assistance53,978$1,316
manufacturing27,929$1,404
retail23,144$737

Source: BLS Local Area Unemployment Statistics; BLS Quarterly Census of Employment and Wages, 2026 Q1 · BLS local unemployment · BLS QCEW · About this topic

The county economy

What the county produces and earns, from the Bureau of Economic Analysis.

real GDP, 2024 (2017 dollars)
$31.9 billion
+6.2% since 2019
personal income per person, 2024
$60,796
28th of Ohio's 88 counties
change in income per person since 2019
+28%
before inflation

Source: BEA regional accounts: county GDP (CAGDP1), per capita personal income (CAINC1), 2024 · BEA county GDP · About this topic

Federal money

What the federal government obligated to the county in fiscal 2025, by county of performance; Social Security, Medicare and most benefits are not counted.

in federal contracts performed in the county, fiscal 2025
$4.7 billion
$8,795 a resident
in federal grants, fiscal 2025
$785 million
$1,461 a resident
in federal loans and loan guarantees
$227,037
in direct federal payments to people and organizations
$4.0 billion

Source: USAspending federal awards by county of performance, fiscal 2025 · USAspending · About this topic

Health rankings

County Health Rankings 2025 measures for the county, with the Ohio figure alongside.

life expectancy at birth
73.3 years
Ohio 75.2
years of life lost before 75, per 100,000 (premature death)
12,141
Ohio 9,740
population health group among U.S. counties
6 of 10
1 is healthiest
community conditions group among U.S. counties
5 of 10
1 is best
of children in poverty
21.5%
Ohio 17.5%
uninsured
7.5%
Ohio 7.1%

No community water system in the county had a health-based drinking water violation in the rankings' reporting year.

County Health Rankings 2025: Montgomery County and Ohio
MeasureMontgomery CountyOhio
Life expectancy at birth (years)73.375.2
Years of potential life lost before 75, per 100,000 (premature death)12,1419,740
Adults in fair or poor health20.3%17.9%
Uninsured7.5%7.1%
Children in poverty21.5%17.5%
Median household income$62,650$67,873
Income inequality (80th to 20th percentile household income ratio)4.74.6
Households with severe housing problems13.3%12.7%
People per primary care physician1,0551,328
People per mental health provider249286
People per dentist1,7391,535
Preventable hospital stays per 100,000 Medicare enrollees3,2463,033
Medicare enrollees with a flu vaccination49%51%
Injury deaths per 100,000136.4100.7
Suicides per 100,00015.314.7
Child deaths per 100,000 (under 18)77.059.2
Infant deaths per 1,000 live births7.97.0
Teen births per 1,000 females 15 to 1922.017.4
Average daily fine-particle pollution (PM2.5, µg/m³)10.37.8
Any drinking water violation in the countyNo
Population used by the rankings533,796
Population health group (1 to 10 among U.S. counties; 1 is healthiest)6
Community conditions group (1 to 10 among U.S. counties; 1 is best)5

Source: County Health Rankings & Roadmaps 2025 (University of Wisconsin Population Health Institute) · County Health Rankings · About this topic

Cancer

New cancers and cancer deaths per 100,000 people, age-adjusted, from the National Cancer Institute's State Cancer Profiles.

new cancers a year per 100,000 people, age-adjusted, 2018 to 2022
477.9
Ohio 472.9 · U.S. 448.6
cases a year
3,326
incidence trend
stable
cancer deaths a year per 100,000, age-adjusted, 2019 to 2023
162.0
Ohio 160.3 · U.S. 145.4
cancer deaths a year
1,173
death-rate trend
falling
-3.3% a year
Cancer incidence by site, 2018 to 2022 (NCI State Cancer Profiles)
SitePer 100,000OhioCases a yearTrend
Lung66.563.6491falling
Colorectal36.338.4247falling
Female breast141.4133.0508falling
Prostate120.3120.8418stable
Leukemia12.913.086stable
Bladder21.521.8156falling

Source: NCI State Cancer Profiles, county incidence 2018-2022 and mortality 2019-2023 · NCI cancer profiles · About this topic

Drug overdoses

Provisional overdose death counts by county from the CDC, 12 months at a time.

overdose deaths in the 12 months ending December 2025
136
CDC provisional count
deaths per 100,000 residents
25.5
Ohio 20.8
deaths a year earlier
178
highest 12-month total since 2020
336
12 months ending February 2021

Source: CDC NCHS provisional county drug overdose deaths, 12-month-ending counts; CDC VSRR for the Ohio row · CDC overdose data · About this topic

Medicare

Who in the county is on Medicare and how they are covered, from CMS enrollment counts.

people on Medicare, 2025
118,286
22% of residents
aged 65 or over
103,907
younger people with disabilities
14,379
chose a Medicare Advantage plan
61.2%
also on Medicaid
17.1%
with Part D drug coverage
82.9%
enrollment since 2020
+5.3%
112,301 enrollees then

Source: CMS Medicare Monthly Enrollment by county, 2025 · CMS Medicare Monthly Enrollment · About this topic

Severe weather

Hail, wind, flooding and tornado reports logged for the county in NOAA's Storm Events database.

severe weather reports, 2016 to 2026
299
NOAA Storm Events log
deaths
2
injuries
166
in reported damage
$503 million
largest hail
1.75 in
June 18, 2021
strongest measured gust
74 mph
March 30, 2025

The costliest event was tornadoes on May 27, 2019, $500 million in damage. The tornado initially touched down just west of Brookville and areas on the south side of Brookville sustained heavy damage, consistent with high-end EF2 wind s…

Severe weather reports by kind, 2016 to 2026 (NOAA Storm Events)
KindReports
damaging thunderstorm wind185
hail48
river and street flooding33
flash floods22
Zone-wide advisories by kind, 2016 to 2026 (NOAA Storm Events)
KindReports
winter weather64
high wind11
winter storms9

Source: NOAA Storm Events database, 2016-2026 · NOAA storm events · About this topic

Weather warnings

Every warning, watch and advisory the National Weather Service has issued for the county since 2015.

tornado warnings since 2015
35
severe thunderstorm warnings
230
flash flood warnings
29
winter storm or blizzard warnings
12
warnings, watches and advisories in all
1,106
National Weather Service products for Montgomery County since 2015 (Iowa Environmental Mesonet archive)
ProductCount
Tornado Warning35
Tornado Watch35
Severe Thunderstorm Warning230
Flash Flood Warning29
Flood Warning11
Areal Flood Warning16
Areal Flood Advisory155
Winter Storm Warning12
Winter Weather Advisory78
Excessive Heat Warning7
Heat Advisory29
Extreme Cold Warning3
Wind Chill Warning4
Snow Squall Warning1
Tornado warnings by year
YearWarnings
20163
20172
20181
20195
20201
20214
20224
20233
20242
20253
20267

Source: National Weather Service warnings/watches/advisories, Iowa Environmental Mesonet VTEC archive, since 2015 · IEM warning archive · About this topic

Drought

How often the U.S. Drought Monitor has put the county in drought since 2000.

weeks in moderate drought or worse since 2020
32
of them severe or worse
3
most recently 3 weeks in 2024
weeks at least abnormally dry since 2020
86
of all weeks since 2000 in drought
7%

The worst reading since 2000 was extreme drought in September 2024.

As of September 1, 2026: no drought.

Source: U.S. Drought Monitor weekly county statistics, 2000-2026 · U.S. Drought Monitor · About this topic

Hazard mitigation

FEMA-funded projects in the county that reduce future flood, storm and other losses: buyouts, plans, studies and equipment.

hazard mitigation projects since 2003
9
FEMA grants
total project worth
$3 million
$2 million federal
properties covered
43

Largest: Acquisition of Private Real Property (Structures and Land) - Riverine for Kettering, $2 million (fiscal 2003).

Mitigation projects by type since 2003 (OpenFEMA)
Project typeProjects
Acquisition of Private Real Property (Structures and Land) - Riverine5
Warning Systems (as a Component of a Planned, Adopted, and Exercised Risk Reduction Plan)1
Advanced Assistance1

Source: OpenFEMA Hazard Mitigation Assistance projects, v4 API · OpenFEMA · About this topic

Air quality this year

The EPA's daily county air quality index for 2026 so far: how many days were good, moderate or worse, and the year's peak.

good air days in 2026 so far
70
of 120 days indexed through April 30, 2026
moderate days
50
days unhealthy for sensitive groups or worse
0
peak air quality index
84
Ozone, April 30, 2026

Source: EPA daily county AQI file for 2026 (January to the file's latest date) · EPA air data files · About this topic

Clean air standards

Which federal air standards the county fails or once failed, from the EPA's Green Book.

Montgomery County is a maintenance area for the fine particulate (1997) standard (Dayton-Springfield, OH area, redesignated 2013), meaning it once failed that standard and must keep a plan to stay clean.

EPA Green Book status for Montgomery County (September 2026)
StandardAreaClassificationStatusRedesignated
fine particulate (1997)Dayton-Springfield, OHFormer Subpart 1maintenance2013

Source: EPA Green Book county nonattainment/maintenance status (nayro.xls, September 2026) · EPA Green Book · About this topic

Air toxics

The EPA's modeled lifetime cancer risk from outdoor air toxics across the county.

lifetime cancer risk from outdoor air toxics
30 in a million
EPA AirToxScreen 2020

Mostly formaldehyde (18.6 in a million) and carbon tetrachloride (2.9 in a million).

Source: EPA AirToxScreen 2020 · EPA AirToxScreen · About this topic

Fluoridated water

The share of county residents on community water whose water is fluoridated, from the Ohio Department of Health.

of residents on community water receive fluoridated water
98.9%

Source: Ohio Department of Health county fluoridation profiles (DataOhio) · ODH fluoridation report (DataOhio) · EPA SDWIS search · About this topic

Firefighting foam (PFAS)

PFAS-based aqueous film-forming foam registered in the county with Ohio EPA, which is collecting it for disposal so it is never sprayed again.

fire departments or other holders registered
12
of PFAS-based AFFF foam registered with Ohio EPA
3,025 gal
in sealed containers
995 gal
in opened containers
2,030 gal

Source: Ohio EPA AFFF firefighting-foam inventory · Ohio EPA PFAS · About this topic

Road salt grants

H2Ohio pays for brine makers, calibrated spreaders and covered salt barns so less chloride reaches streams and wells.

H2Ohio chloride-reduction grants awarded in the county
10

Source: Ohio EPA H2Ohio chloride reduction grants · Ohio EPA chloride reduction grants · About this topic

Rail accidents

Accidents railroads reported to the Federal Railroad Administration in the county since 2010. Yard mishaps at walking speed dominate; main-line derailments are the rare, dangerous ones.

rail equipment accidents since 2010
11
FRA Form 54
derailments
7

Source: FRA Form 54 rail equipment accident reports, county fallback for railAccidentLine() · FRA rail equipment accidents (Form 54) · About this topic

House records

Where the house-by-house records on this county's ZIP pages come from, and how current they are.

parcel records placed on the map
195,168
snapshot of August 31, 2026

Montgomery County Auditor CAMA extract (2026-08-31), Treasurer tax roll and yearly sales files.

Office: Montgomery County Auditor (Karl L. Keith) and Treasurer (John McManus), 451 W Third St, Dayton OH 45422.

These are full appraisal records: every house's year built, value and sales history opens from its ZIP page.

Source: Montgomery County Auditor CAMA extract (2026-08-31), Treasurer tax roll and yearly sales files, snapshot 2026-08-31 · Montgomery County Auditor (Karl L. Keith) and Treasurer (John McManus) · About this topic

Places

The 27 cities, villages and townships whose residents live mostly in Montgomery County, with the population of each.

ZIP codes

The 33 ZIP codes whose residents live mostly in Montgomery County, largest first. Each links to its own page; the water system column links to the utility serving most of its residents.

ZIP codes of Montgomery County: residents (2020 census), the water system serving most residents, radon, home value, school district and flood exposure
ZIPNameResidentsWater systemRadonHome valueSchool districtFlood
45424 Huber Heights and Dayton 50,920 Huber Heights Public Water System 70%
Groundwater (wells)
4.6 pCi/L average radon Median home $183,800 Huber Heights City 2.5 stars overall 0.4% of residents in the 1% floodplain
45342 Miamisburg 37,508 Miamisburg City 52%
Groundwater (wells)
3.1 pCi/L average radon Median home $230,300 Miamisburg City 3.5 stars overall 1.5% of residents in the 1% floodplain
45458 Washington Township and Dayton 36,474 Montgomery County Water Services 1 80%
Groundwater (wells)
3.6 pCi/L average radon Median home $362,700 Centerville City 5 stars overall 0.5% of residents in the 1% floodplain
45459 Centerville and Dayton 28,344 Montgomery County Water Services 1 92%
Groundwater (wells)
4.3 pCi/L average radon Median home $302,100 Centerville City 5 stars overall 2.7% of residents in the 1% floodplain
45417 Dayton 28,079 Dayton Public Water System 61%
Groundwater (wells)
3.7 pCi/L average radon Median home $75,100 Dayton City 2 stars overall 0.4% of residents in the 1% floodplain
45429 Kettering and Dayton 26,514 Montgomery County Water Services 1 97%
Groundwater (wells)
4.0 pCi/L average radon Median home $238,700 Kettering City 4 stars overall 0.6% of residents in the 1% floodplain
45420 Dayton 25,045 Dayton Public Water System 59%
Groundwater (wells)
3.8 pCi/L average radon Median home $131,300 Dayton City 2 stars overall 2.9% of residents in the 1% floodplain
45440 Kettering and Dayton 22,676 Montgomery County Water Services 1 56%
Groundwater (wells)
4.1 pCi/L average radon Median home $267,900 Kettering City 4 stars overall 0.6% of residents in the 1% floodplain
45322 Englewood 21,185 Englewood City 39%
Groundwater (wells)
4.9 pCi/L average radon Median home $179,700 Northmont City 4 stars overall 1.9% of residents in the 1% floodplain
45414 Harrison Township and Dayton 20,693 Montgomery County Water Services 2 73%
Groundwater (wells)
4.8 pCi/L average radon Median home $182,300 Northridge Local 2.5 stars overall 1.2% of residents in the 1% floodplain
45406 Dayton 20,622 Dayton Public Water System 86%
Groundwater (wells)
4.0 pCi/L average radon Median home $85,000 Dayton City 2 stars overall 0.0% of residents in the 1% floodplain
45449 West Carrollton and Dayton 18,976 West Carrollton City 69%
Groundwater (wells)
3.9 pCi/L average radon Median home $163,500 West Carrollton City 3 stars overall 6.3% of residents in the 1% floodplain
45405 Dayton 18,124 Dayton Public Water System 67%
Groundwater (wells)
4.5 pCi/L average radon Median home $84,200 Dayton City 2 stars overall 3.1% of residents in the 1% floodplain
45419 Oakwood and Dayton 16,236 Oakwood City 34%
Groundwater (wells)
3.5 pCi/L average radon Median home $248,400 Oakwood City 5 stars overall 1.5% of residents in the 1% floodplain
45410 Dayton 15,758 Dayton Public Water System 100%
Groundwater (wells)
3.1 pCi/L average radon Median home $110,600 Dayton City 2 stars overall 0.0% of residents in the 1% floodplain
45403 Dayton 15,130 Dayton Public Water System 100%
Groundwater (wells)
4.1 pCi/L average radon Median home $87,500 Dayton City 2 stars overall 0.0% of residents in the 1% floodplain
45377 Vandalia 15,070 Union City 5%
Mostly private wells
4.5 pCi/L average radon Median home $202,800 Vandalia-Butler City 3.5 stars overall 0.6% of residents in the 1% floodplain
45426 Trotwood and Dayton 14,391 Montgomery County Water Services 2 62%
Groundwater (wells)
2.8 pCi/L average radon Median home $123,900 Trotwood-Madison City 2.5 stars overall 0.3% of residents in the 1% floodplain
45415 Clayton and Dayton 12,811 Montgomery County Water Services 2 98%
Groundwater (wells)
5.2 pCi/L average radon Median home $188,600 Northmont City 4 stars overall 3.7% of residents in the 1% floodplain
45409 Dayton 12,392 Dayton Public Water System 53%
Groundwater (wells)
4.1 pCi/L average radon Median home $249,000 Dayton City 2 stars overall 1.9% of residents in the 1% floodplain
45309 Brookville 12,050 Brookville Municipality 50%
Groundwater (wells)
4.9 pCi/L average radon Median home $214,700 Brookville Local 4.5 stars overall 3.4% of residents in the 1% floodplain
45439 Moraine and Dayton 11,726 Montgomery County Water Services 1 82%
Groundwater (wells)
4.2 pCi/L average radon Median home $143,300 West Carrollton City 3 stars overall 6.3% of residents in the 1% floodplain
45402 Dayton 10,735 Dayton Public Water System 100%
Groundwater (wells)
3.4 pCi/L average radon Median home $135,700 Dayton City 2 stars overall 0.4% of residents in the 1% floodplain
45404 Dayton 10,730 Dayton Public Water System 67%
Groundwater (wells)
5.5 pCi/L average radon Median home $86,900 Dayton City 2 stars overall 1.0% of residents in the 1% floodplain
45327 Germantown 9,388 Germantown City 59%
Groundwater (wells)
6.8 pCi/L average radon Median home $218,900 Valley View Local 4 stars overall 9.9% of residents in the 1% floodplain
45345 New Lebanon 5,951 New Lebanon Village 61%
Groundwater (wells)
5.6 pCi/L average radon Median home $153,300 New Lebanon Local 3 stars overall 0.5% of residents in the 1% floodplain
45416 Trotwood and Dayton 5,612 Montgomery County Water Services 2 100%
Groundwater (wells)
4.2 pCi/L average radon Median home $81,100 Dayton City 2 stars overall 0.0% of residents in the 1% floodplain
45315 Clayton 4,818 Englewood City 36%
Groundwater (wells)
5.2 pCi/L average radon Median home $213,300 Northmont City 4 stars overall 0.8% of residents in the 1% floodplain
45325 Jackson Township and Farmersville 2,558 Farmersville Village 38%
Mostly private wells
5.5 pCi/L average radon Median home $234,600 Valley View Local 4 stars overall 3.6% of residents in the 1% floodplain
45354 Phillipsburg 572 Phillipsburg Village 89%
Groundwater (wells)
5.1 pCi/L average radon Median home $151,000 Northmont City 4 stars overall 0.0% of residents in the 1% floodplain
45428 Dayton 303 Dayton Public Water System 100%
Groundwater (wells)
Too few radon tests No Census data Dayton City 2 stars overall 0.0% of residents in the 1% floodplain
45469 Dayton 219 Dayton Public Water System 100%
Groundwater (wells)
Too few radon tests No Census data Dayton City 2 stars overall 0.0% of residents in the 1% floodplain
45423 Dayton 4 Dayton Public Water System 100%
Groundwater (wells)
7.8 pCi/L average radon No Census data Dayton City 2 stars overall 0.0% of residents in the 1% floodplain

Source: residents: 2020 Census (POP100, ZCTA) · water systems: EPA SDWIS + service-area-boundary join · radon: Ohio Department of Health radon test results by ZIP since 2010 · home value: Census ACS 2020-2024 5-year by ZCTA (housing/commute tables) · school districts: Ohio school district boundaries (OGRIP via ODOT) · flood: FEMA National Flood Hazard Layer.

On the map

The map has no county view of its own yet: open it at 45424, the county's most populous ZIP code, and zoom out. Every ZIP code in the table above links to its page, and each page opens the map at that ZIP.

Rankings within the county

The county's ZIP codes ranked by what the map measures; each heading links to the topic's page.

Highest radon

  1. 45423Dayton7.8 pCi/L
  2. 45327Germantown6.8 pCi/L
  3. 45345New Lebanon5.6 pCi/L
  4. 45325Jackson Township and Farmersville5.5 pCi/L
  5. 45404Dayton5.5 pCi/L

Most snow

  1. 45377Vandalia25 in a year
  2. 45354Phillipsburg25 in a year
  3. 45322Englewood25 in a year
  4. 45315Clayton25 in a year
  5. 45309Brookville25 in a year

Oldest homes

  1. 45469Daytonmedian year built 1908
  2. 45410Daytonmedian year built 1919
  3. 45403Daytonmedian year built 1920
  4. 45402Daytonmedian year built 1925
  5. 45405Daytonmedian year built 1928

Highest home values

  1. 45458Washington Township and Dayton$362,700
  2. 45459Centerville and Dayton$302,100
  3. 45440Kettering and Dayton$267,900
  4. 45409Dayton$249,000
  5. 45419Oakwood and Dayton$248,400

Best school stars

  1. 45459Centerville and Dayton5.0 stars
  2. 45458Washington Township and Dayton5.0 stars
  3. 45419Oakwood and Dayton5.0 stars
  4. 45309Brookville4.5 stars
  5. 45440Kettering and Dayton4.0 stars

Cite and data

Cite this page as:

Ohio Hometown Atlas (Open Shower Co), "Montgomery County", https://hometownatlas.openshowerco.com/county/montgomery/, built 2026-09-15, accessed [date].

Machine-readable: /api/county/montgomery.json (open JSON, CC BY 4.0 for the compilation; the underlying records keep their own terms) · How to cite · Report a correction · Built 2026-09-15