Mercer County was named for Hugh Mercer (1726–1777), a physician and general during the American Revolution; Mercer died from wounds suffered at the Battle of Princeton. The county seat is Aledo and the county was organized on January 13, 1825. The county is located in the western area of the state.

Find History in Aledo Did you know that our Mercer County Courthouse, built in 1894, is listed on the National Register of Historic Places? Aledo's mission to preserve history such as our turn of the century architecture, is made apparent as you tour our city. Learn more about Aledo's history.

Paper copies may be obtained for a fee by contacting the Indexing Section at 609-989-6476. We also offer two online search systems for public record searches and links can be found on the bottom of the County Clerk's home page.

Located midway between New York City and Philadelphia in the heart of central New Jersey, the County of Mercer is home to 12 municipalities that span over 226 square miles and contain over 370,000 people.