Peru is a somewhat small city located in the state of Illinois. With a population of 9,771 people and three associated neighborhoods, Peru is the 224th largest community in Illinois.

Compared to the rest of the country, citizens of Peru spend much less time in their cars: on average, their commute to work is only 16.20 minutes. This also means that noise and pollution levels in the city are less than they would otherwise be.

The population of Peru overall has a level of education that is slightly above the US average for all US cities and towns of 21.84%. Of adults 25 and older in Peru, 21.72% have at least a bachelor's degree.

The per capita income in Peru in 2022 was $41,968, which is upper middle income relative to Illinois and the nation. This equates to an annual income of $167,872 for a family of four. However, Peru contains both very wealthy and poor people as well.

The people who call Peru home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Peru residents report their race to be White, followed by Asian. Important ancestries of people in Peru include German, Irish, Italian, Polish, and English.

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