Triangle, Virginia

Triangle, Virginia
Census-designated place (CDP)
Location of Triangle in Prince William County and the state of Virginia
Coordinates: 38°33′5″N 77°19′33″W
Country	United States
State	Virginia
County	Prince William
Area
• Total	3.0 sq mi (7.7 km2)
• Land	2.8 sq mi (7.3 km2)
• Water	0.19 sq mi (0.5 km2)
Elevation	98 ft (30 m)
Population  (2020)
• Total	9,589
• Density	3,400/sq mi (1,300/km2)
Time zone	UTC−5 (Eastern (EST))
• Summer (DST)	UTC−4 (EDT)
ZIP Code	22172
Area codes	571, 703
FIPS code	51-79360
GNIS feature ID	1500234

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