The overall value of land for sale in Christian County, Illinois, recently on Land.com was around $6 million. This represents nearly 1,000 acres of land for sale in Christian County. Christian County ranks 62nd in the Prairie State for the combined amount of land currently advertised for sale. Taylorville had the most land for sale. Christian County is Illinois's 24th biggest county (715 square miles). It's located in the Central Illinois region of Illinois.