Andover, Illinois

Andover is a village in Henry County, Illinois, United States. The population was 578 at the 2010 census, down from 594 at the 2000 census.
Geography
Andover is located at 41°17′42″N 90°17′26″W (41.295011, -90.290658).
According to the 2010 census, the village has a total area of 0.99 square miles (2.6 km2), all land.
Demographics
As of the census of 2000, there were 594 people, 220 households, and 174 families residing in the village. The population density was 594.8 people per square mile (229.3/km²). There were 226 housing units at an average density of 226.3 per square mile (87.3/km²). The racial makeup of the village was 98.48% White, 0.17% Native American, 0.84% Asian, and 0.51% from two or more races. Hispanic or Latino of any race were 0.84% of the population. 27.8% were of Swedish, 26.8% German, 10.2% Irish, 7.7% English and 5.7% American ancestry according to Census 2000.
There were 220 households...