Census-designated place · Prince William County, Virginia

Triangle, Virginia

Triangle is a census-designated place in Prince William County, Virginia, part of the Washington-Arlington-Alexandria, DC-VA-MD-WV metro area. It has 10,450 residents. Triangle, Virginia has a quality-of-life score of 74 out of 100 (high), ranking #4,015 of 15,651 US cities and towns. Within Virginia it ranks #169 of 375 cities and towns. It ranks best on injury deaths (low), distance to an Amtrak station (low) and food environment index (high). It ranks worst on drought exposure (high), mammography screening (low) and unemployment rate (high).

74High

Quality-of-life score: #4,015 of 15,651 cities and towns
Virginia: #169 of 375 in VA
Population: 10,450 (2020-2024)
Land area: 3 mi²
Density: 3,712.1 /mi²
FIPS code: 5179360

Percentile-based score (100 is the best in the country) from 75 of 80 indicators, with the default “Explorer” weights.

Open in the map

Scores by category

Each category averages its indicators' percentile scores among US cities and towns.

Safety64#5,667/15,637
Economy75#3,922/15,631
Housing37#9,491/14,977
Health80#3,093/15,609
Healthcare28#11,282/15,650
Environment89#1,623/15,453
Education87#2,077/15,649
Infrastructure76#3,779/15,650
Community68#4,975/15,651
Leisure & amenities27#11,358/15,651

Strengths · Weaknesses

Indicators where Triangle, Virginia ranks highest and lowest among US cities and towns (score = percentile, 100 = best). Values marked “Prince William County value” are the county’s: the source publishes no figure for this city or town, and the county holding most of its residents stands in.

Strengths

Injury deaths · low46 /100k
97/100Virginia 78 /100kUnited States 87 /100k2019-2023University of Wisconsin Population Health InstitutePrince William County value
Distance to an Amtrak station · low5 mi
96/100Virginia 14 miUnited States 43 mi2026Federal Aviation Administration · Bureau of Transportation Statistics · U.S. Census BureauPrince William County value
Food environment index · high9.4
96/100Virginia 8.9United States 7.62019 & 2023University of Wisconsin Population Health InstitutePrince William County value
Child poverty rate · low4.1%
94/100Virginia 11.8%United States 15.5%2020-2024U.S. Census Bureau Census table B17001High uncertainty
Traffic deaths · low5.6 /100k
91/100Virginia 10.7 /100kUnited States 12.3 /100k2020-2024National Highway Traffic Safety AdministrationProvisional dataPrince William County value
Life expectancy · high81.3 yrs
91/100Virginia 77.8 yrsUnited States 77.6 yrs2021-2023University of Wisconsin Population Health InstitutePrince William County value

Weaknesses

Drought exposure · high84%
9/100Virginia 70%United States 43%Oct 2025–Sep 2026National Drought Mitigation Center (University of Nebraska–Lincoln), USDA and NOAAPrince William County value
Mammography screening · low37.0%
11/100Virginia 47.0%United States 46.0%2023University of Wisconsin Population Health InstitutePrince William County value
Unemployment rate · high9.0%
12/100Virginia 3.4%United States 4.3%2020-2024U.S. Bureau of Labor Statistics Census table B23025
Uninsured residents (under 65) · high16.9%
13/100Virginia 8.1%United States 9.8%2020-2024U.S. Census Bureau Census table B27010
Public libraries · low0.2 /10k
14/100Virginia 0.4 /10kUnited States 0.5 /10k2024Institute of Museum and Library ServicesPrince William County value
Primary care shortage · high16.0
14/100Virginia 6.6United States 6.2Oct 2026Health Resources and Services AdministrationPrince William County value

Trends

The largest changes over about five years, next to the country's over the same periods.

PopulationRising
8,972 (2015-2019) → 10,450 (2020-2024)
+16%5 yearsCensus table B01003US 328,329,953 → 340,003,797
Child poverty rateImproving
16.8% (2015-2019) → 4.1% (2020-2024)
−13 pts5 yearsCensus table B17001US 16.8% → 15.5%
Broadband subscriptionsImproving
88.1% (2015-2019) → 96.3% (2020-2024)
+8.3 pts5 yearsCensus table B28002US 82.7% → 91.0%
Poverty rateImproving
15.2% (2015-2019) → 7.6% (2020-2024)
−7.6 pts5 yearsCensus table B17001US 12.3% → 12.1%
Median household incomeImproving
$84,288 (2015-2019) → $109,693 (2020-2024)
+30%5 yearsCensus table B19013US $65,712 → $81,604
High school diploma or higherImproving
87.8% (2015-2019) → 93.1% (2020-2024)
+5.2 pts5 yearsCensus table B15003US 88.0% → 89.6%

What changed in five years

How each measure moved between two periods about five years apart, read against whether more or less is better, the published margin of error and the same change in other places.

Over about five years, Triangle, Virginia improved on 4 of 13 measures with a comparison and declined on 0. 9 moved within the margin of error and 0 barely changed.

Earlier (2015-2019)
Latest (2020-2024)
Lower standingHigher standing

Position is the place's standing among cities and towns: further right is better, whichever way the measure counts.

Improved4

Poverty−7.6 points15.2% → 7.6%
Inequality−0.0660.478 → 0.412
Household income+30%$84,288 → $109,693
Broadband+8.3 points88.1% → 96.3%

Declined0

No measure declined by more than its margin of error.

All 13 measures

Change of every measure of Triangle, Virginia between two periods about five years apart
Measure	Before	After	Change	Reading	Favourable vs peers
Average commute time	43.4 min2015-2019	38.7 min2020-2024	−4.7 min	Within the margin of error	89%
Bachelor's degree or higher	37.3%2015-2019	40.8%2020-2024	+3.6 points	Within the margin of error	56%
Broadband subscriptions	88.1%2015-2019	96.3%2020-2024	+8.3 points	Improved	51%
Effective property tax rate	0.96%2015-2019	0.75%2020-2024	−0.2 points	Within the margin of error	59%
High school diploma or higher	87.8%2015-2019	93.1%2020-2024	+5.2 points	Within the margin of error	83%
Home price to income ratio	5.4×2015-2019	4.6×2020-2024	−0.8×	Within the margin of error	96%
Income inequality (Gini index)	0.4782015-2019	0.4122020-2024	−0.066	Improved	89%
Median household income	$84,2882015-2019	$109,6932020-2024	+30%	Improved	56%
Poverty rate	15.2%2015-2019	7.6%2020-2024	−7.6 points	Improved	88%
Rent as share of income	32.0%2015-2019	31.9%2020-2024	−0.1 points	Within the margin of error	57%
Rent-burdened households	56.0%2015-2019	56.6%2020-2024	+0.6 points	Within the margin of error	53%
Unemployment rate	7.7%2015-2019	9.0%2020-2024	+1.3 points	Within the margin of error	24%
Uninsured residents (under 65)	15.3%2015-2019	16.9%2020-2024	+1.6 points	Within the margin of error	29%

“Against peers” compares the change with the same change in the 14640 cities and towns that have the same two periods. It describes how common a change is, not why it happened.

Sources: American Community Survey 5-Year Estimates. Values are the latest and the one five years earlier of the same publisher dataset; datasets that changed publisher in between are never compared.

Survey estimates (American Community Survey) compare the two most recent 5-year windows that do not share years, so the margin of error of the difference holds. The 2015-2019 window predates the pandemic and 2020-2024 includes it.
A change counts only when it is larger than 1.645 times the square root of the two standard errors squared, summed (a 90% margin). Measures published without a margin must change by at least 5% to count.
“Against peers” compares the change with the same change in the 15651 cities and towns that have the same two periods. It describes how common a change is, not why it happened.
Standing is a percentile among the same places: 0 is the lowest value on the measure (or the worst when lower is better), 100 the best.

Cities and towns like Triangle, Virginia five years ago that improved

The places whose measures looked most like those of Triangle, Virginia in the earlier period, ranked by how many measures improved beyond the margin of error, minus how many declined. A comparison of published data, not a forecast and not advice.

For comparison, Triangle, Virginia itself moved +10.3 points in standing on average over the same 10 measures (standings of all places average about zero).

How the ranking works

Similarity is the root-mean-square difference of standings in the earlier period over the measures most places have. Places are ranked by measures that improved beyond the margin of error minus those that declined (a count that estimation noise in small places cannot inflate), then by the mean change of standing over the measures a place has in both periods. Only places with more improvements than declines and a rise in standing are listed. Standings are relative, so a place can improve in absolute terms and still lose standing.

Who lives here

Age, race and education of residents, from the American Community Survey. Shares are of all residents (age), residents of every origin (race) or adults 25 and over (education).

Age and sex

10,450 residents (±1,183)

Men
Women

80 and over†
70–79†
60–69†

Income

How household income is spread, not just the middle: each bar is the share of households in that income range.

Household income

3,312 households (±291)

Triangle, Virginia
Virginia share

Under $25k8.4%†279
$25k–50k16%†518
$50k–75k

Homes

Who owns and who rents, what homes cost, and what the housing stock looks like.

Owners and renters

3,312 households (±291)

Triangle, Virginia
Virginia share

Own63%2,089
Rent37%1,223

Biggest shift since 2015–2019: Own (+14.2 points).

Table view

Getting to work

How workers travel to their job and how long it takes them.

How people get to work

4,834 workers (±650)

Triangle, Virginia
Virginia share

Drive alone70%3,373
Carpool11%†520
Public transit2.5%†

Jobs and pay

What the largest occupations here pay, from the Bureau of Labor Statistics' Occupational Employment and Wage Statistics survey.

The Bureau of Labor Statistics publishes pay by metro area, not by county or city. The metro area page lists its largest occupations and lets you look up any job.

Pay in the Washington-Arlington-Alexandria, DC-VA-MD-WV

Local businesses

Employer businesses and sole proprietors by industry, per resident and against the state and the nation. Counts of businesses next to counts of people, not a measure of demand.

The Census Bureau publishes business counts by county, not by city, so these are the figures of Prince William County, the county holding most of Triangle's residents.

Prince William County has 9,286 employer establishments, 189 for every 10,000 residents (0.76× the US rate of 248; 0.78× Virginia's), with 120,091 paid employees at an average annual pay of $55,828. The Census Bureau also counts 53,892 nonemployer businesses, mostly sole proprietors.

Establishments: 9,286; 53,892 nonemployers
Per 10,000 residents: 189; US 248 · Virginia 241
Paid employees: 120,091
Average annual pay: $55,828; US $68,342

Employer establishments, employees, average pay and nonemployers of Prince William County by industry, with the density per resident against the nation

Specialty trade contractors	1,011	20.6	1.33×More than typical	13,872	$67,668	4,871
Ambulatory health care services	772	15.7	0.75×Fewer than typical	8,361	$64,890	2,221
Restaurants and other eating places	720	14.7	0.80×Fewer than typical	14,193	$22,223	358
Lessors of real estate	425	8.6	0.70×Fewer than typical	1,230	$64,323	3,310
Computer systems design and related services	413	8.4	1.94×More than typical	3,474	$111,947	748
Services to buildings and dwellings	397	8.1	1.20×About typical	2,894	$42,448	3,285
Construction of buildings	384	7.8	1.03×About typical	1,929	$67,389	2,182
Management, scientific and technical consulting	372	7.6	1.13×About typical	4,262	$85,605	2,006
Limited-service restaurants	369	7.5	0.94×About typical	7,096	$20,007	111
Building equipment contractors	297	6	1.00×About typical	4,254	$72,609	994
Building finishing contractors	292	5.9	1.56×More than typical	2,892	$46,066	2,041
Full-service restaurants	279	5.7	0.74×Fewer than typical	5,960	$25,427	177

Rank places for an industry Open Prince William County

County Business Patterns (2023); Nonemployer Statistics (2024)

Per-resident figures divide by the population estimate of 2023: 491,396 residents here, 336,755,052 in the United States. County Business Patterns counts establishments in 2023; the Nonemployer Statistics count businesses in 2024.
“More than typical” is a density at least 1.25 times the nation's per resident, “fewer” at most 0.8 times, with at least 10 establishments. It compares counts of businesses with counts of people: it says nothing about demand, incomes, size, quality or profit, and visitors and commuters are not residents.
The Census Bureau adds noise to employment and payroll to protect confidentiality, and withholds some figures: an industry with few establishments can show employees or pay as unavailable.
Industries overlap: a narrower industry (full-service restaurants) is part of a broader one (restaurants), so the rows do not add up.
Industries follow the North American Industry Classification System; the two surveys use different editions (NAICS 2017 and 2022), which this page matches industry by industry.

Federal contracts performed here

In FY2026, an estimated $574.1K of federal contract obligations were for work performed in Triangle, Virginia: $54.93 per resident (US $1,994).

Obligations: $574.1K; −41% vs FY2025
Per resident: $54.93; US $1,994
Sole-source: 21%; US 30%
Single offer: 6.6%; US 8.8%

A signal is a reason to look closer, not evidence of wrongdoing: most sole-source awards are lawful and justified.

Top buying agencies

National Park Service$346.2K60%
Defense Commissary Agency$90.2K16%
Defense Health Agency$63.6K11%
Department of Veterans Affairs$29.6K5.2%
Offices, Boards and Divisions$15.8K2.8%
Office of the Chief Financial Officer$9,7131.7%
Department of the Army$6,3361.1%
Department of the Navy$4,6680.8%

Top recipients

Spending by fiscal year

1MFY2017
3.7MFY2018
1.1MFY2019
3.5MFY2020
196.2KFY2021
2.1MFY2022
1MFY2023
899.4K

Top industries (NAICS)

Nonresidential building construction · 2362$176.6K31%
Highway, street, and bridge construction · 2373$126.6K22%
Other support services · 5619$90.2K16%
Management, scientific, and technical consulting services · 5416$79.7K14%
Agriculture, construction, and mining machinery manufacturing · 3331$38.4K6.7%
Support activities for forestry · 1153$30.2K

Source: Federal contract transactions (Federal Procurement Data System) (U.S. Department of the Treasury, USAspending.gov), data current to Oct 3, 2026, loaded Oct 3, 2026.

How this is estimated

Agencies report each contract action's place of performance as a county and a ZIP code. A ZIP code's money is split among the cities it covers by the share of its land inside each (Census 2020 ZIP code tabulation areas); the part outside city limits stays with the county.

The place of performance is what the contracting agency reports, often the contractor's office rather than where the work happens.
Shares are of land, not of people or businesses: a ZIP code that is mostly rural land but has its offices in town gives the town less than it should.
ZIP codes that are not mapped areas (post office boxes, the unique ZIP codes of large federal sites and companies) stay with their county, unless one city covers nearly all of it.
Counts of actions and awards include those only partly in Triangle, Virginia, so they do not add up across cities.

Triangle, Virginia's figures are part of those of Prince William County, VA ($2.3B in FY2026), never added to them: 0.0% of that total.

Grants and other federal assistance are counted by county here, not split among cities: Triangle is mostly in Prince William County.

See federal money in Prince William County

Representation in Congress

Members serving today, with their record in the current Congress (party-unity votes cast with their caucus, roll calls missed). Not a grade.

Triangle, Virginia is split between congressional districts: each representative is shown with the share of its residents in their district (current boundaries).

House

Senate

County

A city can lie in several counties. Some indicators are published for counties only: the page marks them.

Prince William County84100% of residents

Metro area

The metro or micro area the city belongs to.

Washington-Arlington-Alexandria, DC-VA-MD-WV86

Other cities and towns in Prince William County

Largest first.

Similar cities and towns

Closest indicator profiles across the country (no model: score distances).

Data and sources

Latest published value of each indicator; periods differ by source. Values flagged by their publisher are marked.

PLACES: Local Data for Better HealthCenters for Disease Control and Prevention · release 2025
Local Area Unemployment StatisticsU.S. Bureau of Labor Statistics · release 2025
American Community Survey 5-Year EstimatesU.S. Census Bureau · release 2017-2024
Population Estimates ProgramU.S. Census Bureau · release 2025
Small Area Health Insurance EstimatesU.S. Census Bureau · release 2024
Small Area Income and Poverty EstimatesU.S. Census Bureau · release 2024
County Health Rankings & RoadmapsUniversity of Wisconsin Population Health Institute · release 2022-2025+2026-03-supplement

JSON · /api/v1/places/5179360

Scores by category

Strengths · Weaknesses

Strengths

Weaknesses

Trends