Mercer County, New Jersey Genealogy

United States &gt; New Jersey &gt; Hudson County

Parent County
1840, formed from Bergen County; 1852, part of Harrison twp. returned to Bergen County as Union twp.; 1892, water boundary clarified.

Web Sites

 * USGenWeb project. May have maps, name indexes, history or other information for this county. Select the state, then the county.
 * Family History Library Catalog