Niles is a medium-sized city located in the state of Ohio. With a population of 18,238 people and five associated neighborhoods, Niles is the 100th largest community in Ohio.

The citizens of Niles are slightly better educated than the national average of 21.84% for all cities and towns, with 21.25% of adults in Niles having a bachelor's degree or advanced degree.

The per capita income in Niles in 2022 was $31,468, which is middle income relative to Ohio, and lower middle income relative to the rest of the US. This equates to an annual income of $125,872 for a family of four. However, Niles contains both very wealthy and poor people as well.

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

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