Land for sale in Missouri's Mercer County recently totaled nearly $23 million and 4,000 acres. Mercer County ranks 88th out of 115 counties in the Gateway State for the total acreage of land currently advertised for sale. There were two properties listed as sold in Mercer County through the Land Network Comparable Sales Program. This represented a total value of $1,606,500. Of all land for sale in Mercer County, Princeton had the most land for sale. Mercer County has a large agricultural economy, with 567 farms recorded in the county during the latest U.S. Census. Farming activities in Mercer County generate annual revenues of $5 million, the majority of which comes from livestock products. Mercer County is the 95th largest county (455 square miles) in Missouri. It's located in the Northwest Missouri region of the state.