A total of around 1,000 acres were listed for sale in New Jersey's Mercer County recently, representing a combined approximately $234 million in Mercer County farms and rural land for sale. Mercer County ranks 11th in the Garden State for the total number of acres of land currently advertised for sale. Among cities in Mercer County with land for sale, Princeton featured the most land for sale. Government and state-level services are the main economic drivers in Mercer County. Mercer County is the 16th largest county (228 square miles) in New Jersey. It's located in the Central New Jersey region of the state.