31.5 years. The median income for a household in the county was $50,597 and the median income for a family was $58,127. Males had a median income of $48,887 versus $43,658 for females. The per capita income for the county was $30,720. About 15.7% of families and 20.6% of the population were below the poverty line, including 28.1% of those under age 18 and 19.1% of those age 65 or over. Ancestry According to the 2012-2016 American Community Survey 5-Year Estimates, the largest ancestry groups in Suffolk County, Massachusetts are: Demographic breakdown by town Income Data is from the 2007-2011 American Community Survey 5-Year Estimates. Communities Boston (traditional county seat) Chelsea Revere Winthrop Education Each city has its own school district (including Boston Public Schools, Chelsea Public Schools, Revere Public Schools, and Winthrop Public Schools), which all follow municipal boundaries. Tertiary institutions in the county include: Bay State College Benjamin Franklin Institute of Technology Berklee College of Music Boston Architectural College Boston College (eastern side) Boston University Bunker Hill Community College Includes a Chelsea Campus Cambridge College Emerson College Emmanuel College Fisher College parts of Harvard University, including Harvard Business School and Harvard Medical School Massachusetts College of Art and Design Massachusetts College of Pharmacy and Health Sciences MGH Institute of Health Professions New England College of Optometry New England Conservatory New England Law Boston North Bennet Street School Northeastern University Roxbury Community College Saint John's Seminary Sattler College Simmons University Suffolk University Tufts University School of Medicine University of Massachusetts Boston Urban College of Boston Wentworth Institute of Technology Public library systems in the county include: Boston Public Library Chelsea Public Library Revere Public Library Winthrop Public Library and Museum See also List of Massachusetts locations by per capita income Registry of Deeds (Massachusetts) USS Suffolk County (LST-1173) National Register of Historic Places listings in Suffolk County, Massachusetts References External links Suffolk County Sheriff's Department Suffolk County District Attorney Suffolk County Registry of Deeds Walling & Gray. 1871 Map of Boston, Suffolk, County and Nearby Towns Pages 48-49 from the 1871 Atlas of Massachusetts. National Register of Historic Places listing for Suffolk Co., Massachusetts Map of cities and towns of Massachusetts Massachusetts counties Counties in Greater Boston 1643 establishments in Massachusetts Populated places established in 1643 1999 disestablishments in Massachusetts Populated places disestablished in 1999