Andalusia is a city located in Rock Island County Illinois. With a 2020 population of 1,136, it is the 617th largest city in Illinois and the 9807th largest city in the United States . Andalusia is currently declining at a rate of -0.53% annually and its population has decreased by -3.57% since the most recent census, which recorded a population of 1,178 in 2010. Andalusia reached it's highest population of in . Spanning over 1 miles, Andalusia has a population density of 967 people per square mile.
The average household income in Andalusia is $83,656 with a poverty rate of 5.88%. The median rental costs in recent years comes to $808 per month, and the median house value is $135,700. The median age in Andalusia is 47 years, 42.1 years for males, and 48.6 years for females.