Cities in Seneca County, Ohio by Population (2024)

There are 23 cities in Seneca County, Ohio.

Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)

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City
Rank
State
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
Tiffin1Ohio17,48117,967-0.69%2,4177.23
Fostoria2Ohio13,03713,043-0.01%1,7217.57
Bellevue3Ohio8,1438,225-0.26%1,3296.13
Clyde4Ohio6,3466,3100.14%1,2155.22
Carey5Ohio3,4683,558-0.66%1,6062.16
Green Springs6Ohio1,2201,228-0.16%1,0521.16
Attica7Ohio867870-0.11%1,3000.67
New Washington8Ohio852867-0.47%6361.34
Bloomville9Ohio848868-0.59%1,4060.60
Sycamore10Ohio764794-1.04%1,1990.64
Bettsville11Ohio592596-0.17%1,1360.52
Risingsun12Ohio5485460%9610.57
Republic13Ohio538553-0.74%6240.86
McCutchenville14Ohio50521117.17%1822.78
Bascom15Ohio38518914.58%2541.51
Flat Rock16Ohio3252615.18%1,5330.21
New Riegel17Ohio278286-0.71%1,3900.20
Kansas18Ohio2405213.21%5470.44
Chatfield19Ohio198204-1%6710.29
Fort Seneca20Ohio1341026.35%2140.63
West Millgrove21Ohio128130-0.78%4920.26
Melmore22Ohio1046211.83%1750.59
Old Fort23Ohio80218-26.61%1390.58

Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.

What is the largest city in Seneca County, Ohio?

Tiffin is the largest city in Seneca County.

What is the smallest city in Seneca County, Ohio?

Old Fort is the smallest city in Seneca County.

How many cities are in Seneca County?

There are 23 cities in Seneca County, Ohio.

Frequently Asked Questions