Carlinville is a city in Macoupin County, Illinois, United States. As of the 2000 Census, the population was 5,685, and 5,912 at a 2009 estimate. It is the county seat of Macoupin County, and so it is an outlying part of the Metro-East region of the Greater St. Louis metropolitan area.
Carlinville is also the home of Blackburn College, a small college affiliated with the Presbyterian church, and Prairie Farms Dairy.
Carlinville is named for Thomas Carlin, once Governor of Illinois, who as a member of the state legislature was instrumental in creating Macoupin County.