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// Workers AI · dad joke modeWhy did Triangle, Virginia go to therapy? It had an angular issue.

From Wikipedia, the free encyclopedia

Triangle, Virginia
Census-designated place (CDP)
Location of Triangle in Prince William County and the state of Virginia
Location of Triangle in Prince William County and the state of Virginia
Coordinates: 38°33′5″N 77°19′33″W / 38.55139°N 77.32583°W / 38.55139; -77.32583
CountryUnited States
StateVirginia
CountyPrince William
Area
[1]
 • Total
3.0 sq mi (7.7 km2)
 • Land2.8 sq mi (7.3 km2)
 • Water0.19 sq mi (0.5 km2)
Elevation
98 ft (30 m)
Population
 (2020)[2]
 • Total
9,589
 • Density3,400/sq mi (1,300/km2)
Time zoneUTC−5 (Eastern (EST))
 • Summer (DST)UTC−4 (EDT)
ZIP Code
22172
Area codes571, 703
FIPS code51-79360[3]
GNIS feature ID1500234[4]

Triangle is a census-designated place (CDP) in southeastern Prince William County, Virginia, United States. The population was 9,589 at the 2020 census.[2] It is bounded to the south by the Marine Corps Base Quantico, which surrounds the town of Quantico. Part of the National Capital Region,[5] it is approximately 32 miles southwest of Washington, D.C.

Geography

[edit]

According to the U.S. Census Bureau, Triangle has a total area of 7.7 square miles (3.0 km2), of which 7.3 square miles (2.8 km2) is land and 0.5 square miles (0.2 km2) is water.[1] It is bounded to the north and west by Dumfries, to the west by Prince William Forest Park, and to the east by the Potomac River. The National Museum of the Marine Corps is located here.

Demographics

[edit]
Historical population
CensusPop.Note%±
19602,948—
19703,0212.5%
19804,77057.9%
19904,740−0.6%
20005,50016.0%
20108,18848.9%
20209,58917.1%
U.S. Decennial Census[6]
1950[7] 1960[8] 1970[9]
1980[10] 1990[11] 2000[12]
2010[13]

In the 1950 United States census, Triangle was combined with Dumfries, Virginia to form Dumfries-Triangle (pop 1,585).[7] However, the two communities were separated again by the time of the 1960 U.S. census.[8] It was listed as a census designated place in the 1980 U.S. census.[10]

Racial and ethnic composition

[edit]
Triangle CDP, Virginia – Racial and ethnic composition
Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.
Race / Ethnicity (NH = Non-Hispanic) Pop 2000[14] Pop 2010[15] Pop 2020[16] % 2000 % 2010 % 2020
White alone (NH) 3,195 2,836 2,218 58.09% 34.64% 23.13%
Black or African American alone (NH) 1,533 2,962 3,800 27.87% 36.17% 39.63%
Native American or Alaska Native alone (NH) 22 18 21 0.40% 0.22% 0.22%
Asian alone (NH) 158 438 632 2.87% 5.35% 6.59%
Native Hawaiian or Pacific Islander alone (NH) 6 9 24 0.11% 0.11% 0.25%
Other race alone (NH) 14 20 109 0.25% 0.24% 1.14%
Mixed race or Multiracial (NH) 164 397 516 2.98% 4.85% 5.38%
Hispanic or Latino (any race) 408 1,508 2,269 7.42% 18.42% 23.66%
Total 5,500 8,188 9,589 100.00% 100.00% 100.00%

2010 census

[edit]

As of the 2010 census,[3] there were 5,500 people, 2,196 households, and 1,341 families living in the CDP. The population density was 2,088.5 inhabitants per square mile (806.4/km2). There were 2,318 housing units at an average density of 880.2 per square mile (339.8/km2). The racial makeup of the CDP was 61.07% White, 28.33% African American, 0.49% Native American, 2.87% Asian, 0.11% Pacific Islander, 3.58% from other races, and 3.55% from two or more races. Hispanic or Latino of any race were 7.42% of the population.

There were 2,196 households, out of which 33.9% had children under the age of 18 living with them, 40.4% were married couples living together, 15.3% had a female householder with no husband present, and 38.9% were non-families. 29.7% of all households were made up of individuals, and 3.6% had someone living alone who was 65 years of age or older. The average household size was 2.50 and the average family size was 3.13.

In the CDP, the population was spread out, with 27.8% under the age of 18, 13.2% from 18 to 24, 34.4% from 25 to 44, 18.4% from 45 to 64, and 6.2% who were 65 years of age or older. The median age was 30 years. For every 100 females, there were 102.2 males. For every 100 females age 18 and over, there were 101.1 males.

The median income for a household in the CDP was $38,844, and the median income for a family was $43,811. Males had a median income of $32,017 versus $27,722 for females. The per capita income for the CDP was $18,982. About 7.1% of families and 8.8% of the population were below the poverty line, including 11.4% of those under age 18 and 4.9% of those age 65 or over.

Government

[edit]

Triangle is part of Virginia's 31st House of Delegates district; as of 10 January 2018, residents are represented by Elizabeth Guzmán.

References

[edit]
  1. 1 2 "2020 U.S. Gazetteer Files". United States Census Bureau. Retrieved October 30, 2021.
  2. 1 2 "Triangle CDP, Virginia - Census Bureau Profile". U.S. Census Bureau. Retrieved September 27, 2025.
  3. 1 2 "U.S. Census website". United States Census Bureau. Retrieved January 31, 2008.
  4. ↑ "Triangle". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved February 1, 2026.
  5. ↑ "National Capital Region Map". www.ncpc.gov. Retrieved August 18, 2025.
  6. ↑ "Decennial Census by Decade". United States Census Bureau.
  7. 1 2 "1950 Census of Population - Number of Inhabitants - Virginia" (PDF). United States Census Bureau. Archived from the original (PDF) on January 18, 2026.
  8. 1 2 "1960 Census of Population - Number of Inhabitants - Virginia" (PDF). United States Census Bureau. Archived from the original (PDF) on March 1, 2025.
  9. ↑ "1970 Census of Population - Number of Inhabitants - Virginia" (PDF). United States Census Bureau. Archived from the original (PDF) on June 18, 2026.
  10. 1 2 1980 Census of Population: Number of Inhabitants - Virginia United States Census Bureau
  11. ↑ "1990 Census of Population - Population and Housing Unit Counts - Virginia" (PDF). United States Census Bureau. Archived from the original (PDF) on March 1, 2025.
  12. ↑ "2000 Census of Population - Population and Housing Unit Counts - Virginia" (PDF). United States Census Bureau. Archived from the original (PDF) on March 28, 2025.
  13. ↑ "2010 Census of Population - Population and Housing Unit Counts - Virginia" (PDF). United States Census Bureau. Archived from the original (PDF) on June 19, 2026.
  14. ↑ "P004: Hispanic or Latino, and Not Hispanic or Latino by Race – 2000: DEC Summary File 1 – Triangle CDP, Virginia". United States Census Bureau.
  15. ↑ "P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2010: DEC Redistricting Data (PL 94-171) – Triangle CDP, Virginia". United States Census Bureau.
  16. ↑ "P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2020: DEC Redistricting Data (PL 94-171) – Triangle CDP, Virginia". United States Census Bureau.
[edit]
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