Pecatonica is a village in Winnebago County, Illinois, United States. It is part of the Rockford, Illinois Metropolitan Statistical Area. The population was 2,195 at the 2010 census, up from 1,997 in 2000.
Pecatonica is located at 42°18′36″N 89°21′31″W / 42.31000°N 89.35861°W / 42.31000; -89.35861 (42.309955, -89.358647).
According to the 2010 census, Pecatonica has a total area of 1.295 square miles (3.35 km), of which 1.28 square miles (3.32 km) (or 98.84%) is land and 0.015 square miles (0.04 km) (or 1.16%) is water.
As of the census of 2000, there were 1,997 people, 791 households, and 579 families residing in the village. The population density was 1,607.2 people per square mile (621.8/km²). There were 827 housing units at an average density of 665.6 per square mile (257.5/km²). The racial makeup of the village was 98.35% White, 0.25% African American, 0.15% Native American, 0.10% Asian, 0.25% from other races, and 0.90% from two or more races. Hispanic or Latino of any race were 0.60% of the population.
There were 791 households out of which 38.8% had children under the age of 18 living with them, 60.7% were married couples living together, 8.8% had a female householder with no husband present, and 26.7% were non-families. 23.4% of all households were made up of individuals and 11.9% had someone living alone who was 65 years of age or older. The average household size was 2.52 and the average family size was 2.97.
In the village, the population was spread out with 27.2% under the age of 18, 6.1% from 18 to 24, 30.8% from 25 to 44, 21.0% from 45 to 64, and 14.9% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 91.5 males. For every 100 females age 18 and over, there were 89.9 males.
The median income for a household in the village was $47,361, and the median income for a family was $55,086. Males had a median income of $40,900 versus $27,143 for females. The per capita income for the village was $20,420. About 3.6% of families and 4.7% of the population were below the poverty line, including 5.7% of those under age 18 and 8.2% of those age 65 or over.