Commuting Flows by Metro Area: Where Americans Really Work

01 How This Data Works

Nationally, 72.4% of American workers are employed in the same county where they live; the rest cross at least one county line to get to work. The Census Bureau periodically publishes a county-to-county commuting flow file: for every pair of counties in the country, how many workers reported living in one and working in the other. It's built from American Community Survey responses and is the most granular, comprehensive public data on where Americans actually work relative to where they live. The version used in this article is the 5-Year ACS commuting flow file covering 2009–2013, the most recent comprehensive county-to-county flow file in our source data.

Throughout this article, self-containment means the share of a county's (or metro area's) resident workers who also work within that same county (or metro area). A high self-containment rate means most residents work locally; a low rate means a large share of the workforce commutes elsewhere, often to a bigger neighboring metro area with more jobs.

02 National Self-Containment

Across the country, 140.7 million workers are captured in the commuting flow data. Of those, 101.8 million (72.4%) live and work in the same county. The remaining 27.6% cross at least one county line every workday.

Most of the workforce lives somewhere with a defined metropolitan statistical area (MSA): 86.4% of all workers reside in a county that is part of an MSA, versus 13.6% in non-metropolitan counties. Among workers in the 50 largest metro areas (each with more than 500,000 resident workers), the average metro-level self-containment rate is 94.7%, and the median is 96.2%, meaning most large metro areas keep the vast majority of their workforce within the same metro, even when workers cross internal county lines to do it.

03 Which Metro Areas Keep Workers Local

Self-containment varies a lot even among large metro areas. Some, like Miami and Phoenix, are largely self-sufficient labor markets. Others sit close enough to a bigger neighboring metro that a substantial share of their residents commute out entirely. These are the metro areas where the true commute burden is heaviest.

Riverside-San Bernardino, the Inland Empire, stands well apart from every other large metro area: its 78.4% self-containment rate is more than 5 points lower than the next-lowest metro (Raleigh, at 83.4%). This matches the region's well-known reputation for long "supercommutes" into Los Angeles and Orange County, where jobs pay more but housing is far more expensive than in the Inland Empire itself.

04 The Biggest Commuting Flows in America

Beyond self-containment rates, the raw commuting flow numbers reveal exactly which specific county pairs carry the most daily commuters in the country. Unsurprisingly, dense urban cores next to even denser job centers dominate the list.

Zooming out from individual counties to entire metro areas shows the same pattern at a larger scale: two adjacent, expensive coastal metro areas exchanging huge numbers of commuters, or a smaller metro area functioning as a de facto commuter suburb of a bigger one next door.

Two of these pairs are large enough in both directions to function almost like a single combined labor market split across a metro-area boundary. Los Angeles and Riverside-San Bernardino exchange roughly 388,000 total commuters combined (292,164 plus 95,815), and San Francisco-Oakland and San Jose exchange roughly 253,700 combined. In both cases, the flow is mostly toward the higher-cost coastal metro for work while living in the more affordable inland one.

05 What This Means for Commute Costs

This dataset measures worker flow counts, not commute distance or dollars, so it can't directly tell you how much a given flow costs in fuel or time. But self-containment is a useful proxy: metro areas with low self-containment (Riverside-San Bernardino, Raleigh, Providence, Baltimore, San Jose) are, almost by definition, places where a meaningful share of the workforce is commuting past the boundary of their own metro area, which tends to mean longer trips than commuting within a single, more self-contained metro. For state-level and national commute distance and cost figures, see our average commute distance by state and cost of commuting by car articles, which use more current (2023) Census data.

The practical takeaway for anyone evaluating where to live relative to where they work: a metro area's overall self-containment rate is a reasonable early signal of how commute-heavy that region's housing market is. A high-self-containment metro like Miami or Phoenix suggests most residents can find work without a long cross-metro trip; a low-self-containment metro like Riverside-San Bernardino suggests a large share of the workforce is already making that trade-off between housing cost and commute length.

06 Data Sources

1. U.S. Census Bureau: County-to-County Commuting Flows, 2009–2013 American Community Survey 5-Year Estimates. census.gov