Union County, Ohio Cities (2024)

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.)

City
Rank
2024 Pop.
2020 Pop.
Change
Density (/mi²)
Area (mi²)
Type
Marysville129,32825,7063.18%1,80216.3City
Richwood22,5802,2343.45%2,0771.2Village
Milford Center39348093.43%2,2130.4Village
Magnetic Springs43032613.41%1,4230.2Village
Unionville Center5232239-0.85%1,4680.2Village
Raymond6138155-5.48%1091.3CDP

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 Union County, Ohio?

Marysville is the largest city in Union County.

What is the smallest city in Union County, Ohio?

Raymond is the smallest city in Union County.

How many cities are in Union County?

There are 6 cities in Union County, Ohio.

Frequently Asked Questions