Bachelor's degree or higher, explained

What it measures

This metric is the percentage of adults age 25 and older with at least a bachelor's degree. The 25-and-older floor is the convention because most people complete a four-year degree by 25, so including younger adults would mechanically depress the rate. The numerator counts everyone whose highest completed degree is a bachelor's, master's, professional (MD, JD, etc.), or doctorate. The denominator is the population 25 and older. People with some college but no four-year degree are not counted in the numerator, even if they have a two-year associate's degree.

This is the single most-cited education statistic in US local-area demographics because the bachelor's degree is the threshold where the labor-market returns to education become sharply non-linear: median earnings for bachelor's holders are roughly 65% higher than for those with only a high-school diploma.

Why it matters

Bachelor's-share is the most reliable single predictor of an area's median income, home values, voting patterns, life expectancy, and labor-market resilience. Metros with bachelor's shares above 40% (Boston, San Francisco, Washington DC, Seattle, Raleigh-Durham) have weathered the last three recessions far better than metros below 25%. Employers building research, professional-services, or tech operations use bachelor's-share as a primary site-selection screen. State-level changes in bachelor's-share track migration of college-educated young adults, a state that gains share is attracting talent; one that loses share is losing it.

How the Census measures it

The number comes from ACS Table B15003, Educational Attainment for the Population 25 Years and Over. The ACS asks every respondent for their highest degree completed and reports the response in 25 categories from "no schooling" through "doctorate." CensusEasy sums the bachelor's, master's, professional, and doctorate categories and divides by the universe. The 5-year ACS produces stable estimates even for small places. Historical comparisons back to 2000 use the same definition; 1990 used a slightly different question structure but is methodologically comparable.

How to read the numbers

The US bachelor's-share is about 35%. State rates range from roughly 23% in West Virginia and Mississippi to over 45% in Massachusetts and Colorado. Among metros, the leaders (Boulder, San Jose, San Francisco, Washington DC, Raleigh-Durham, Boston) all exceed 50%; small college towns can post rates above 70%. The lowest figures are in rural areas across the South and parts of Appalachia, where the historical labor market did not require a four-year degree and where young graduates often leave for opportunity elsewhere. A 10-point gap in bachelor's-share between two metros usually corresponds to roughly a $15,000 gap in median household income.

Caveats and limitations

Bachelor's-share captures completed degrees, not skill or earning power directly. Two places with identical bachelor's-shares can have very different earnings if their dominant industries pay differently, a metro full of social workers and teachers will earn less than one full of software engineers. The metric also doesn't capture trade and technical skills that don't carry a four-year credential but command high wages (industrial electricians, machinists, commercial pilots). For places with a major university, the resident degree share can be inflated by faculty and staff who live in the area but earn modest salaries.