San Juan County, New Mexico

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San Juan County, New Mexico
San Juan County New Mexico Administration Building.jpg
San Juan County Administration Building in Aztec
Seal of San Juan County, New Mexico
Map of New Mexico highlighting San Juan County
Location in the state of New Mexico
Map of the United States highlighting New Mexico
New Mexico's location in the U.S.
Seat Aztec
 • Total 5,538 sq mi (14,343 km2)
 • Land 5,514 sq mi (14,281 km2)
 • Water 24 sq mi (62 km2), 0.44%
 • (2010) 130,004
 • Density 23/sq mi (9/km²)
Congressional district 3rd
Time zone Mountain: UTC-7/-6
San Juan County includes the New Mexico section of the Four Corners Monument.

San Juan County is a county located in the U.S. state of New Mexico. As of the 2010 census, the population was 130,044.[1] Its county seat is Aztec.[2]

San Juan County is part of the Farmington, NM Metropolitan Statistical Area. It is located in the northwest corner of the state and includes the New Mexico portion of the Four Corners.


According to the U.S. Census Bureau, the county has a total area of 5,538 square miles (14,344 km²), of which 5,514 square miles (14,281 km²) is land and 24 square miles (63 km²) (0.44%) is water.[3] Indian reservations (and off-reservation trust lands) comprise 63.4 percent of the county's land area: The Navajo Indian Reservation takes up 60.45% and the Ute Mountain Ute Tribe Reservation another 2.93%.

The physical features include three rivers: the San Juan, Animas, and La Plata rivers; also, the Chuska Mountains and Shiprock Pinnacle to the west, volcanic structures, buttes, mesas, badlands, and fertile river valleys.

Adjacent counties[edit]

San Juan County in New Mexico and Utah are two of twenty-two counties or parishes in the United States with the same name to border each other across state lines. The others are Union Parish, Louisiana and Union County, Arkansas, Big Horn County, Montana and Big Horn County, Wyoming, Sabine County, Texas and Sabine Parish, Louisiana, Bristol County, Massachusetts and Bristol County, Rhode Island, Kent County, Delaware and Kent County, Maryland, Escambia County, Alabama and Escambia County, Florida., Pike County, Illinois and Pike County, Missouri, Teton County, Idaho and Teton County, Wyoming, Park County, Montana and Park County, Wyoming, and Vermilion County, Illinois and Vermillion County, Indiana. respectively. (Note, despite the different spellings, the source of the name is the same for Vermilion County, Illinois and Vermillion County, Indiana--the Vermillion River which flows through both counties.)

National protected areas[edit]

Major highways[edit]


Historical population
Census Pop.
1910 8,504
1920 8,333 −2.0%
1930 14,701 76.4%
1940 17,115 16.4%
1950 18,292 6.9%
1960 53,306 191.4%
1970 52,517 −1.5%
1980 81,433 55.1%
1990 91,605 12.5%
2000 113,801 24.2%
2010 130,044 14.3%
Est. 2012 128,529 −1.2%
U.S. Decennial Census[4]
2012 Estimate[1]


Whereas according to the 2010 U.S. Census Bureau:


As of the census[5] of 2000, there were 113,801 people, 37,711 households, and 28,924 families residing in the county. The population density was 21 people per square mile (8/km²). There were 43,221 housing units at an average density of 8 per square mile (3/km²). The racial makeup of the county was 52.83% White, 0.44% Black or African American, 36.88% Native American, 0.27% Asian, 0.05% Pacific Islander, 6.77% from other races, and 2.78% from two or more races. 14.99% of the population were Hispanic or Latino of any race.

There were 37,712 households out of which 42.00% had children under the age of 18 living with them, 55.70% were married couples living together, 14.70% had a female householder with no husband present, and 23.30% were non-families. 19.30% of all households were made up of individuals and 6.40% had someone living alone who was 65 years of age or older. The average household size was 2.99 and the average family size was 3.43.

In the county the population was spread out with 32.60% under the age of 18, 10.00% from 18 to 24, 28.10% from 25 to 44, 20.20% from 45 to 64, and 9.10% who were 65 years of age or older. The median age was 31 years. For every 100 females there were 98.30 males. For every 100 females age 18 and over, there were 94.70 males.

The median income for a household in the county was $33,762, and the median income for a family was $37,382. Males had a median income of $35,066 versus $21,299 for females. The per capita income for the county was $14,282. About 18.00% of families and 21.50% of the population were below the poverty line, including 26.60% of those under age 18 and 18.20% of those age 65 or over.



Census-designated places[edit]

Other communities[edit]

See also[edit]


  1. ^ a b "State & County QuickFacts". United States Census Bureau. Retrieved September 30, 2013. 
  2. ^ "Find a County". National Association of Counties. Retrieved June 7, 2011. 
  3. ^ "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. February 12, 2011. Retrieved April 23, 2011. 
  4. ^ "U.S. Decennial Census". Retrieved September 30, 2013. 
  5. ^ "American FactFinder". United States Census Bureau. Retrieved January 31, 2008. 

Coordinates: 36°31′N 108°19′W / 36.51°N 108.32°W / 36.51; -108.32