Which US counties produce the most pro athletes?

We pulled every active player in the NFL, NBA, MLB, and NHL, found the 4,394 born in the United States, matched each one's birthplace to a county, and divided by the county's population. The result is a ranking of which counties produce pro athletes, per resident, across all four major leagues.

This counts where players were born, not where they grew up. Birthplace is what the leagues record and it's reproducible, but a player born in a regional hospital may have been raised a county over. Read this as "born per 100,000 residents," not "raised."

The most athletic counties, per capita

Ranking by total pro athletes per 100,000 residents, among counties of at least 100,000 people, the leader is St. Louis, Missouri, an independent city that produces football, baseball, and hockey players at a rate nothing else its size matches. Behind it the list turns sharply Southern, and sharply in the state of Georgia.

Look at the sport column, NFL players dominate almost every county, partly because football has the largest rosters and partly because we pulled the leagues in mid-August, when NFL teams carry roughly 90 players before cutting down to the 53 man roster for the regular season. So treat the cross-sport totals as football-weighted.

By raw count instead of per capita, the giants win

Drop the population per capita adjustment and, as always, the biggest counties take over. Los Angeles County, the largest county in the nation with 10,014,009 residents, leads with 106 active players, followed by Harris County (4,731,145 residents, Houston) at 78, Cook County (5,275,541 residents , Chicago) at 74, and Maricopa County (4,420,568 residents, Phoenix) at 73. Fulton County (1,066,710 residents, Atlanta) ranks sixth here too, and Gwinnett (957,062 residents, Atlanta) ranks twelfth, which is remarkable as the two metro Atlanta counties aren't among the country's largest.

Every sport has a different map

The most striking finding isn't the overall list, it's that each league draws from a different part of the country.

Hockey is the most obvious one. The top NHL counties per capita are almost all in Minnesota and Michigan: Dakota, Hennepin, and Ramsey counties around the Twin Cities, plus Oakland and Washtenaw in Michigan. Cold states with frozen ponds still supply America's hockey players.

Basketball peaks in unexpected mid-sized places. The top NBA county per capita is Summit County, Ohio, the county of LeBron James's Akron, followed by Cobb and Fulton counties in Atlanta and Baltimore County in Maryland. Football belongs to the Deep South and Atlanta's suburbs, with Jefferson County (Birmingham, Alabama), Gwinnett, and Fulton on top. Baseball splits between St. Louis, California, and the South.

Which counties are strong across all four sports

To find the true all-around producers, we ranked each county by its percentile in all four leagues and averaged them, a measure that ignores roster sizes and rewards breadth. By that balanced score, Fulton County, Georgia is the most athletic county in America, with 41 NFL, 8 NBA, and 19 MLB players. Cobb County and Baltimore follow, then Caddo Parish, St. Louis, Leon County in Florida, and Gwinnett. Three of the top seven counties are all in metro Atlanta.

Gwinnett

It sits 6th per capita, 7th on the balanced score, and 12th by raw count, with 53 active players, 43 of them in the NFL. Among counties over 900,000 people, only Fulton produces at a higher rate. The reputation is real, and now it's measured. Gwinnett features some of the strongest high school football teams in the nation.