Land for sale in Logan County, Illinois, recently totaled nearly $9 million and around 1,000 acres. Logan County ranks 83rd out of 102 counties in the Prairie State for the total number of acres of land currently advertised for sale. Of all locations in Logan County with land for sale, Lincoln featured the most land for sale. Logan County is Illinois's 34th largest county (618 square miles). It's located in the Central Illinois region of Illinois.