Colona is a city in Henry County, Illinois, along the Green River.

[5] Colona lies near the Rock River in a valley, and is surrounded by higher land.

[6] As of the 2020 census[2] there were 5,045 people, 2,220 households, and 1,473 families residing in the city.

There were 2,189 housing units at an average density of 558.13 per square mile (215.50/km2).

28.38% of all households were made up of individuals, and 10.54% had someone living alone who was 65 years of age or older.