Union County, Ohio

Founding: 1820
Parent counties: Delaware, Franklin, Logan, and Madison

Namesake: A traditional name
Seats: Milford Center (1820–1822); Marysville (1822–)

Land area: 432 square miles

Population (2020): 62,774

Population (historic): 1,996 (1820); 12,204 (1850); 18,730 (1870); 22,342 (1900); 19,192 (1930)

Periods of population growth: pre-1820–1890; 1930–2020

Subdivisions: Two cities; five villages; two CDPs; 14 townships

Pre-1940 residences (estimated): 3,257 (16.6%)
Pre-1940 housing survival rate: 66.7%
Pre-1860 housing survival rate (1940): 11.7%

Farm housing in disrepair (1950): 7.3%

Nonfarm housing in disrepair (1950): 6.3%
Average farmhouse value (1930): $1,621
Average outbuilding value (1930): $1,466
Average farmhouse size (1940): 6.9 rooms
Number of farms (1920): 2,736
Average farm size (1920): 83 acres
Sources of settlement: Virginia, Pennsylvania, Germany, and Vermont
_________________________________________________________________________________

Marysville

Namesake: Mary Cuthbertson, daughter of the city's founder

Founding: 1819 (platting); 1824 (post office); 1840 (incorporation)

Population (2020): 25,571

Population (historic): 360 (1840); 849 (1860); 2,061 (1880); 3,048 (1900); 3,639 (1930)

Periods of population growth: pre-1840–1910; 1920–2020
Pre-1940 residences (estimated): 690 (8.4%)

_________________________________________________________________________________

View and filter the data. Or see a map.

_________________________________________________________________________________