Ottawa is a medium-sized city located in the state of Illinois. With a population of 18,752 people and five associated neighborhoods, Ottawa is the 132nd largest community in Illinois.

Also of interest is that Ottawa has more people living here who work in computers and math than 95% of the places in the US.

The citizens of Ottawa are slightly better educated than the national average of 21.84% for all cities and towns, with 21.93% of adults in Ottawa having a bachelor's degree or advanced degree.

The per capita income in Ottawa in 2022 was $37,776, which is upper middle income relative to Illinois and the nation. This equates to an annual income of $151,104 for a family of four. However, Ottawa contains both very wealthy and poor people as well.

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

The most common language spoken in Ottawa is English. Other important languages spoken here include Spanish and German/Yiddish.