Marion is a medium-sized city located in the state of Ohio. With a population of 35,327 people and 14 associated neighborhoods, Marion is the 38th largest community in Ohio. Marion has an unusually large stock of pre-World War II architecture, making it one of the older and more historic cities.

In Marion, just 10.10% of people have at least a bachelor's degree, which is quite a bit lower than the national average for cities and towns of 21.84%.

The per capita income in Marion in 2022 was $20,974, which is low income relative to Ohio and the nation. This equates to an annual income of $83,896 for a family of four. However, Marion contains both very wealthy and poor people as well.

Marion is a very ethnically-diverse city. The people who call Marion home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Marion residents report their race to be White, followed by Black or African-American. Important ancestries of people in Marion include German, English, Irish, Italian, and Scottish.

The most common language spoken in Marion is English. Other important languages spoken here include Spanish and Arabic.