Ottawa

Population

18,097 (2020)

Type

City

Area

14.89 sq mi (38.57 km²), 0.86 sq mi water

Median age

41.7

Households

9,979

Persons per household

2.4

Median household income

$53,793

Average house value

$137,500

Businesses

675

Employees

9,812

Government

CITY OF OTTAWA

Government office

301 W MADISON ST, OTTAWA, IL 61350