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Middlesex County, Massachusetts locator map According to the United States Census Bureau, Cambridge is a City that is located in Middlesex County, Massachusetts at 42.38 degrees North and 71.11 degrees West.  The city's time zone is America/New York, and the city's primary telephone area code is 857.  The land area of Cambridge is about 6.39 square miles, whereas the water area of the city is about 0.72 square miles.  Middlesex County's land area is about 818 square miles, so the city occupies about 0.8 percent of the county's total land area.

The Census Bureau estimates that Cambridge had about 113,630 residents in 2017, which is approximately 17,782 people per square mile of land area. 

According to recent American Community Survey data, Cambridge had 44,013 total estimated households and the median household income was about $75,909 per year. 

The Massachusetts counties map at upper right shows Middlesex County, highlighted in red.  Use the menu below to display interactive maps of Cambridge, either in a frame on this page or in full-screen mode. 

Use the menu below to display categorized Cambridge directories. 

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