Mason, Warren County

Mason

City · Warren County · 34,795 residents · 1.12% municipal income tax

Warren County

Local history for this place is being researched county by county outward from Franklin County; here is what the records say.

Ohio River intake at the plant's riverfront on Kellogg Ave in the California neighborhood, east Cincinnati The water here

Cincinnati Public Water System66% of residentsOhio River (Miller Plant, ~88%) plus Great Miami Buried Valley Aquifer wells (~12%)
Warren Co. Socialville26% of residentsOhio River (Miller Plant, ~88%) plus Great Miami Buried Valley Aquifer wells (~12%)
Butler Co. Water District 24% of residentsHamilton wells (Great Miami aquifer) + Cincinnati (Ohio River + wells)
Warren County2% of residentsWells in the Little Miami and Great Miami river valley aquifers
Lebanon City2% of residentsOhio River + Great Miami Aquifer (via Cincinnati GCWW)
Western Water Company0% of residentsLittle Miami River valley wells (51%) plus Cincinnati Ohio River water (49%)
Warren Co. Pennyroyal Area0% of residentsGreat Miami Buried Valley Aquifer (own wells)

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

The ZIP codes serving Mason
ZIP	Share	Water	Radon	Home value	Schools	Flood
45040 Mason	59%	Ohio River intake at the plant's riverfront on Kellogg Ave in the California neighborhood, east Cincinnati	3.8 pCi/L average radon	Parcel list only	Mason City · 5 stars overall	1.6% of residents in the 1% floodplain
45036 Lebanon	3%	Ohio River intake at the plant's riverfront on Kellogg Ave in the California neighborhood, east Cincinnati	4.2 pCi/L average radon	Parcel list only	Lebanon City · 4 stars overall	3.5% of residents in the 1% floodplain

Warren County: 12 ZIP codes, 24 cities, villages and townships, 222,825 people.

Cite this page as:

Cracked Buckeye (Open Shower Co), "Mason, Warren County", https://crackedbuckeye.com/place/mason/, built 2026-09-16, accessed [date].

Machine-readable: /api/place/mason.json (open JSON, CC BY 4.0 for the compilation; the underlying records keep their own terms) · How to cite · Report a correction · Built 2026-09-16