Greenville is a somewhat small city located in the state of Ohio. With a population of 12,720 people and five associated neighborhoods, Greenville is the 147th largest community in Ohio. Greenville has an unusually large stock of pre-World War II architecture, making it one of the older and more historic cities.

The citizens of Greenville are slightly less educated than the national average of 21.84% for the average city or town: 16.62% of adults in Greenville have a bachelor's degree or advanced degree

The per capita income in Greenville in 2022 was $28,285, which is lower middle income relative to Ohio and the nation. This equates to an annual income of $113,140 for a family of four. However, Greenville contains both very wealthy and poor people as well.

The people who call Greenville home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Greenville residents report their race to be White, followed by Black or African-American. Important ancestries of people in Greenville include German, Irish, English, Dutch, and French.

The most common language spoken in Greenville is English. Other important languages spoken here include Spanish and Langs. of India.