April 24, 2026

Arlington County: America's Most Educated Big County

By Adelle Wood · 2 minute read

In Arlington County, Virginia, 77.1% of adults hold at least a bachelor's degree, a figure more than 3.6 times the national county median of 21.5%. Among large US counties with a population of 200,000 or more, no place matches it. The 235,463 residents earn a median household income of $140,160, and per capita income runs $88,024. Only 7.1% of residents live in poverty.

A college town without the college

Unlike university enclaves that skew young, Arlington's educational profile is tied to its labor market. Federal agencies, the Pentagon, and professional services firms concentrate demand for graduate degrees and credentials, and the county's civilian labor force participation rate of 76.3% is well above the national norm. The share of residents with a high school diploma or higher, 95.4%, is near saturation. That combination of mass credentialing and near full adult literacy is rare at any scale.

How Arlington compares nationally

Among counties with at least 200,000 residents, Arlington sits at the top of the table for bachelor's attainment. The leading large-population counties, ranked by percent of adults with a bachelor's degree or higher:

Arlington County, Virginia: 77.1% bachelor's or higher, population 235,463
Howard County, Maryland: 64.5% bachelor's or higher, population 333,916
Fairfax County, Virginia: 64.3% bachelor's or higher, population 1,144,474
Loudoun County, Virginia: 64.0% bachelor's or higher, population 427,082
New York County, New York: 64.0% bachelor's or higher, population 1,627,788
Boulder County, Colorado: 63.9% bachelor's or higher, population 328,317
District of Columbia, District of Columbia: 63.6% bachelor's or higher, population 672,079
Williamson County, Tennessee: 61.8% bachelor's or higher, population 254,609
Hamilton County, Indiana: 61.8% bachelor's or higher, population 357,176
Douglas County, Colorado: 60.9% bachelor's or higher, population 368,283

Across every county in the country, Arlington ranks number 2 of 3,222 on bachelor's attainment. The only jurisdiction ahead of it, Falls Church city, has fewer than 15,000 residents.

Where Arlington fits in Virginia

Virginia's county median for bachelor's attainment is 26.3%, already well above the national county median. Arlington still clears that benchmark by more than 50 percentage points. The state's ten most credentialed jurisdictions, ranked on the same metric:

The cluster around Washington, D.C. dominates the list. Virginia's high-attainment jurisdictions are almost all inside the Capital Beltway corridor.

Connectivity, language, and migration

Education statistics track closely with digital connectivity and international ties. In Arlington, 94.5% of households subscribe to broadband internet, and 21.9% of residents were born outside the United States. 28.6% of residents age 5 and older speak a language other than English at home. Highly educated counties tend to be international counties, and Arlington fits the pattern.

The price tag on an educated zip code

Living near that concentration of credentials is expensive. The median value of an owner-occupied home in Arlington is $864,800, and residents' incomes reflect the cost of entry. Median household income at $140,160 is roughly 2.2 times the national county median of $63,161. For households priced out of ownership, a typical renter pays $2,275 a month in gross rent, with 30.0% of households spending at least 30% of income on housing.

What the profile tells us

Arlington's numbers illustrate a broader pattern in American education data. The highest attainment rates concentrate in jurisdictions that pair professional labor markets with immigrant inflows and high housing costs. The county is a useful benchmark for anyone comparing workforce readiness, federal hiring catchments, or talent density across US metros.

Data source: U.S. Census Bureau, American Community Survey (ACS) 5-Year Estimates