Galesburg is a city located in Knox County Illinois. It is also the county seat of Knox County. With a 2020 population of 29,855, it is the 63rd largest city in Illinois and the 1293rd largest city in the United States . Galesburg is currently declining at a rate of -0.57% annually and its population has decreased by -7.27% since the most recent census, which recorded a population of 32,195 in 2010. Galesburg reached it's highest population of 37,243 in 1960. Spanning over 18 miles, Galesburg has a population density of 1,683 people per square mile.
The average household income in Galesburg is $51,294 with a poverty rate of 21.36%. The median rental costs in recent years comes to $637 per month, and the median house value is $75,900. The median age in Galesburg is 40.3 years, 38.1 years for males, and 44.4 years for females.