Caseyville is a village in St. Clair County, Illinois, United States. The population was 4,400 at the 2020 census, an increase from 4,245 in 2010. A wealthy man named Charles Harbour built a house here, and in 1845 built a sawmill. There were deposits of coal in the area, and Harbour was one of several members of the Illinois Coal Company, along with Zad…
Caseyville is a village in St. Clair County, Illinois, United States. The population was 4,400 at the 2020 census, an increase from 4,245 in 2010. A wealthy man named Charles Harbour built a house here, and in 1845 built a sawmill. There were deposits of coal in the area, and Harbour was one of several members of the Illinois Coal Company, along with Zadok Casey, Walter Seates, Malcomb Robinson, Charles Barrett and John Roy. Casey had held several offices including United States Representative and Lieutenant Governor of Illinois. In 1849, the Illinois Coal Company founded the town and named it for Casey. Coal mining began, and in 1851 the company constructed a railroad to nearby Brooklyn to transport the coal. In 1850 there were about 40 people here, and by 1851 this had increased to about 150; by 1881 the population was approximately 800. The first post office was established here in 1856, and the village was incorporated in May 1869. A school was built in 1872, and a church in 1879.
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