The 2010 census reported that the population of Pecatonica was 11,059. Nearly 79% of Pecatonica City's households included children under the age of 18. Another 7.8% had a female householder who did not live with her husband. The median age was 37. The average household size was 2.52, and the average family size was 2.97.
Pecatonica is a city in the state of Illinois. There are about 1,674 registered voters. The majority of these people are White, though Black and Native American people are also represented. In the past 12 months, the poverty rate in Pecatonica was 3.19% for full-time employees, 8.00% for part-time workers, and 4.10% for non-workers. Another interesting fact about the population of Pecatonica is that a small percentage of the population is non-citizen, including legal permanent residents, international students, temporary workers, and illegal immigrants.
Pecatonica has a history of innovation and growth. Before railroads reached the area, it had a gristmill that operated until the 1920s. The village was also home to the Dean Milk Co., which was one of the oldest companies in the area. The village closed its milk plant in 1967, but it had other businesses operating for a few years. In the 1940s, a corn cannery also operated.
The population of Pecatonica is estimated to be 4,576 as of 2020. The city's zip code is 61063. There are three banks in the city. The two largest are the German-American State Bank and the U.S. Bank National Association.