Andalusia is a village in Rock Island County, Illinois, United States.

[3] At the 2000 census there were 1,050 people, 402 households, and 307 families living in the village.

The population density was 1,463.4 inhabitants per square mile (565.0/km2).

There were 415 housing units at an average density of 578.4 per square mile (223.3/km2).

[5] Of the 402 households 34.1% had children under the age of 18 living with them, 63.2% were married couples living together, 10.7% had a female householder with no husband present, and 23.4% were non-families.