Caledonia is a village in Boone County, Illinois, United States. It is part of the Rockford, Illinois Metropolitan Statistical Area. The population was 197 at the 2010 census, down from 199 in 2000.
Caledonia is located at 42°22′04″N 88°53′33″W / 42.36778°N 88.89250°W / 42.36778; -88.89250 (42.367850, -88.892538).
According to the 2010 census, Caledonia has a total area of 1.01 square miles (2.62 km), all land.
As of the census of 2000, there were 199 people, 71 households, and 54 families residing in the village. The population density was 373.0 people per square mile (145.0/km²). There were 75 housing units at an average density of 140.6 per square mile (54.6/km²). The racial makeup of the village was 99.8% White. However, population statistics only represent the village, not the surrounding neighborhoods, which include Aberdeen, Aberdeen Knoll and Inverness.
There were 71 households out of which 45.1% had children under the age of 18 living with them, 67.6% were married couples living together, 8.5% had a female householder with no husband present, and 23.9% were non-families. 18.3% of all households were made up of individuals and 11.3% had someone living alone who was 65 years of age or older. The average household size was 2.80 and the average family size was 3.20.
In the village, the population was spread out with 30.2% under the age of 18, 9.0% from 18 to 24, 32.7% from 25 to 44, 17.1% from 45 to 64, and 11.1% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 103.1 males. For every 100 females age 18 and over, there were 98.6 males.
Estimated median household income in 2012: $62,172 (it was $51,250 in 2000)