|Columbia, New Hampshire|
Columbia Covered Bridge, built in 1912
COLUMBIA NEW HAMPSHIRE Latitude and Longitude:
|• Board of Selectmen||Norman Cloutier, Chair|
|• Total||60.6 sq mi (157.0 km2)|
|• Land||60.3 sq mi (156.1 km2)|
|• Water||0.3 sq mi (0.9 km2) 0.55%|
|Elevation||1,024 ft (312 m)|
|• Density||12/sq mi (4.8/km2)|
|Time zone||UTC-5 ( Eastern)|
|• Summer ( DST)||UTC-4 ( Eastern)|
|ZIP codes||03576, 03590|
|GNIS feature ID||0873568|
The township was originally chartered in 1762 and named Preston, after Richard Graham, 1st Viscount Preston of Scotland. Settlers failed to meet the terms of the original grant, so the plantation was transferred in 1770 to grantees including Sir James Cockburn, 8th Baronet, after which it was named Cockburn Town, incorporated on 16 December 1797.  In 1811, in the lead-up to the War of 1812, Governor John Langdon changed the name to Columbia. 
Although the surface is uneven and mountainous, the soil was of good quality. Maple sugar became an important product, and lumber was cut and transported on rafts down the Connecticut River to markets. By 1859, when the population was 762, Columbia had four sawmills, three gristmills, two clapboard machines, and a starch mill. 
According to the United States Census Bureau, the town has a total area of 60.6 square miles (157 km2), of which 60.3 square miles (156 km2) is land and 0.3 square miles (0.78 km2) is water, comprising 0.55% of the town.  It is drained by the east and west branches of Simms Stream. The highest point is the summit of Blue Mountain, at 3,720 feet (1,130 m) above sea level. Columbia lies fully within the Connecticut River watershed. 
The town is served by U.S. Route 3.
|U.S. Decennial Census |
As of the census  of 2000, there were 750 people, 300 households, and 218 families residing in the town. The population density was 12.3 people per square mile (4.8/km²). There were 449 housing units at an average density of 7.4 per square mile (2.8/km²). The racial makeup of the town was 97.60% White, 0.13% African American, 0.27% Native American, 0.27% Asian, and 1.73% from two or more races. Hispanic or Latino of any race were 0.67% of the population.
There were 300 households out of which 31.7% had children under the age of 18 living with them, 60.0% were married couples living together, 7.7% had a female householder with no husband present, and 27.3% were non-families. 21.3% of all households were made up of individuals and 8.0% had someone living alone who was 65 years of age or older. The average household size was 2.49 and the average family size was 2.82.
In the town, the population was spread out with 24.8% under the age of 18, 4.4% from 18 to 24, 26.5% from 25 to 44, 29.1% from 45 to 64, and 15.2% who were 65 years of age or older. The median age was 42 years. For every 100 females, there were 113.7 males. For every 100 females age 18 and over, there were 101.4 males.
The median income for a household in the town was $36,964, and the median income for a family was $42,143. Males had a median income of $27,604 versus $19,732 for females. The per capita income for the town was $16,859. About 4.0% of families and 7.3% of the population were below the poverty line, including 6.8% of those under age 18 and 10.1% of those age 65 or over.
- United States Census Bureau, American FactFinder, 2010 Census figures. Retrieved March 23, 2011.
- Article in Statistics and Gazetteer of New-Hampshire (1875)
- History of Columbia, Coos County, New Hampshire
- Coolidge, Austin J.; John B. Mansfield (1859). A History and Description of New England. Boston, Massachusetts. pp. 448–449.
- "Geographic Identifiers: 2010 Demographic Profile Data (G001) - Columbia town, New Hampshire". U.S. Census Bureau American Factfinder. Archived from the original on September 11, 2013. Retrieved November 8, 2011.
- Foster, Debra H.; Batorfalvy, Tatianna N.; Medalie, Laura (1995). Water Use in New Hampshire: An Activities Guide for Teachers. U.S. Department of the Interior and U.S. Geological Survey.
- "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 April 22, 2013. Retrieved June 4, 2016.
- "American FactFinder". United States Census Bureau. Archived from the original on 2013-09-11. Retrieved 2008-01-31.