In 2019, Gallia County, OH had a population of 30.1k people with a median age of 40.7 and a median household income of $44,858. Between 2018 and 2019 the population of Gallia County, OH declined from 30,195 to 30,088, a −0.354% decrease and its median household income grew from $42,113 to $44,858, a 6.52% increase.
The 5 largest ethnic groups in Gallia County, OH are White (Non-Hispanic) (93.1%), Black or African American (Non-Hispanic) (2.18%), Two+ (Non-Hispanic) (1.75%), Asian (Non-Hispanic) (0.771%), and White (Hispanic) (0.648%). 0% of the households in Gallia County, OH speak a non-English language at home as their primary language.
99.4% of the residents in Gallia County, OH are U.S. citizens.
In 2019, the median property value in Gallia County, OH was $110,200, and the homeownership rate was 74.5%. Most people in Gallia County, OH drove alone to work, and the average commute time was 27.8 minutes. The average car ownership in Gallia County, OH was 2 cars per household.