Cambridge is a township in Coos County in the state of New Hampshire. In New Hampshire, locations, grants, townships (which are different from towns), and purchases are unincorporated portions of a county which are not part of any town and have limited self-government (if any, as many are uninhabited). Most of the township is forested wilderness, but it contains the southernmost edge of Umbagog Lake, accessed via New Hampshire Route 26 from Errol or from Upton, Maine. It contains a section of the 13-Mile Woods Scenic Area along the Androscoggin River. New Hampshire Route 16 also crosses the northwest corner of the township. The population was 8 at the 2010 census.  It is part of the Berlin, NH– VT Micropolitan Statistical Area.
It was granted in 1793 to Nathaniel Rogers and others and contained about 23,160 acres (9,370 ha). 
According to the United States Census Bureau, the township has a total area of 51.1 square miles (132.3 km2), of which 50.4 square miles (130.5 km2) is land and 0.7 square miles (1.8 km2), or 1.39%, is water.  The highest point is the summit of Cambridge Black Mountain, at 2,780 feet (850 m) above sea level.
|U.S. Decennial Census |
As of the census  of 2000, there were 10 people, 5 households, and 3 families residing in the township. The population density was 0.2 people per square mile (0.1/km²). There were 39 housing units at an average density of 0.8 per square mile (0.3/km²). The racial makeup of the township was 100.00% White.
There were 5 households out of which 40.0% had children under the age of 18 living with them, 60.0% were married couples living together, and 40.0% were non-families. 40.0% of all households were made up of individuals and 20.0% had someone living alone who was 65 years of age or older. The average household size was 2.00 and the average family size was 2.67.
In the township, the population was spread out with 20.0% under the age of 18, 30.0% from 25 to 44, 40.0% from 45 to 64, and 10.0% who were 65 years of age or older. The median age was 44 years. For every female of any age, there was one male.
- United States Census Bureau, American FactFinder, 2010 Census figures. Retrieved March 23, 2011.
- Article in Statistics and Gazetteer of New-Hampshire (1875)
- "Geographic Identifiers: 2010 Demographic Profile Data (G001) - Cambridge township, New Hampshire". U.S. Census Bureau American Factfinder. Archived from the original on September 11, 2013. Retrieved November 9, 2011.
- "Annual Estimates of the Resident Population: April 1, 2010 to July 1, 2017 (PEPANNRES): Minor Civil Divisions – New Hampshire". Retrieved November 14, 2018.
- "Census of Population and Housing". Census.gov. Archived from the original on May 12, 2015. Retrieved June 4, 2016.
- "American FactFinder". United States Census Bureau. Archived from the original on 2013-09-11. Retrieved 2008-01-31.