<page_title> List of United States cities by population density </page_title> <section_title> Incorporated places with a density of over 10,000 people per square mile </section_title> <table> <cell> Somerville <col_header> Incorporated place </col_header> </cell> <cell> Massachusetts <col_header> State </col_header> </cell> <cell> Chelsea <col_header> Incorporated place </col_header> </cell> <cell> Massachusetts <col_header> State </col_header> </cell> </table>
Chelsea is one of the most densely populated cities in Massachusetts, ranking behind Somerville.