Andalusia is a village in Rock Island County, Illinois, United States. The population was 1,178 at the 2010 census, an increase from 1,050 in 2000.
Andalusia is located at 41°26′26″N 90°43′15″W / 41.44056°N 90.72083°W / 41.44056; -90.72083 (41.440431, -90.720932).
According to the 2010 census, Andalusia has a total area of 1.181 square miles (3.06 km), of which 1.18 square miles (3.06 km) (or 99.92%) is land and 0.001 square miles (0.00 km) (or 0.08%) is water.
As of the census of 2000, there were 1,050 people, 402 households, and 307 families residing in the village. The population density was 1,463.4 people per square mile (563.1/km²). There were 415 housing units at an average density of 578.4 per square mile (222.5/km²). The racial makeup of the village was 97.05% White, 0.57% African American, 0.10% Native American, 0.76% from other races, and 1.52% from two or more races. Hispanic or Latino of any race were 2.19% of the population.
There were 402 households out of which 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. 18.9% of all households were made up of individuals and 8.0% had someone living alone who was 65 years of age or older. The average household size was 2.61 and the average family size was 3.02.
In the village, the population was spread out with 24.7% under the age of 18, 9.1% from 18 to 24, 29.5% from 25 to 44, 26.2% from 45 to 64, and 10.5% who were 65 years of age or older. The median age was 39 years. For every 100 females, there were 93.7 males. For every 100 females age 18 and over, there were 91.1 males.
The median income for a household in the village was $46,552, and the median income for a family was $56,250. Males had a median income of $37,438 versus $25,179 for females. The per capita income for the village was $20,626. About 3.1% of families and 2.9% of the population were below the poverty line, including 2.8% of those under age 18 and 11.1% of those age 65 or over.