<page_title> Mercer County, New Jersey </page_title> <section_title> Municipalities </section_title> <table> <cell> Mercer County <col_header> Municipality (with map key) </col_header> </cell> <cell> 228.89 <col_header> Total Area (sq. mi.) </col_header> </cell> <cell> 4.33 <col_header> Water Area (sq. mi.) </col_header> </cell> <cell> 224.56 <col_header> Land Area (sq. mi.) </col_header> </cell> </table>
According to the 2010 Census, Mercer County had a total area of 228.89 square miles including 224.56 square miles of land (98.1%) and 4.33 square miles of water.