|Macoupin County Illinois Cities/Towns - Benld, Brighton, Bunker Hill, Carlinville (County Seat), Gillespie, Girard, Medora, Mount Olive, Palmyra, Piasa, Shipman, Staunton, Virden
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Macoupin County is a county located in U.S. state of Illinois. The population was 45,908 in the 2016 official US Census estimate. The county seat is Carlinville.
Macoupin County was established on January 17, 1829. It was named after Macoupin Creek, which runs near Carlinville and meanders southwest to the Illinois River.