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Triangle, Virginia
Location of Triangle in Prince William County and the state of Virginia
Location of Triangle in Prince William County and the state of Virginia
Country United States
State Virginia
County Prince William
Area
 • Total 2.6 sq mi (6.8 km2)
 • Land 2.6 sq mi (6.8 km2)
 • Water 0.0 sq mi (0.0 km2)
Elevation
98 ft (30 m)
Population
 (2010)
 • Total 8,188
 • Density 3,150/sq mi (1,204/km2)
Time zone UTC−5 (Eastern (EST))
 • Summer (DST) UTC−4 (EDT)
ZIP Code
22172
Area code(s) 571, 703
FIPS code 51-79360
GNIS feature ID 1500234

Triangle is a community located in Prince William County, Virginia, in the United States. It is known as a census-designated place (CDP). This means it is an area defined by the U.S. Census Bureau for gathering statistics, but it does not have its own local government like a city or town.

In 2010, about 8,188 people lived in Triangle. To the south, Triangle is right next to the Marine Corps Base Quantico, which is a large military base.

Geography of Triangle

Triangle covers a total area of about 2.6 square miles (6.8 square kilometers). All of this area is land.

Where is Triangle Located?

Triangle is surrounded by several interesting places:

People Living in Triangle

The information below comes from the 2010 census, which is like a big count of all the people in the country.

Population and Homes

In 2010, about 5,500 people lived in Triangle. There were 2,196 households, which are like individual homes or apartments where people live. Out of these, 1,341 were families.

Age Groups in Triangle

The population in Triangle includes people of all ages:

  • About 27.8% of the people were under 18 years old.
  • About 34.4% were between 25 and 44 years old.
  • About 6.2% were 65 years old or older.

The average age of people living in Triangle was 30 years old.

Income Information

In 2010, the average income for a household in Triangle was about $38,844 per year. For families, the average income was around $43,811 per year.

History of Triangle's Census Status

For the 1950 United States Census, Triangle was actually counted together with Dumfries, Virginia. This combined area was called Dumfries-Triangle. However, by the time the 1960 census happened, Triangle and Dumfries were counted as separate communities again.

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