Attendance figures for the third-division version of USL’s top league, which began in 2011 as USL Pro, became simply the United Soccer League and, finally, in 2019, the USL Championship. These numbers cover the years 2011-2016, the last season before USL gained provisional Division II sanctioning from US Soccer.
| United Soccer League 2016 | G | Total | Average |
| FC Cincinnati | 15 | 259,437 | 17,296 |
| Sacramento Republic FC | 15 | 172,711 | 11,514 |
| Louisville City FC | 15 | 108,269 | 7,218 |
| San Antonio FC | 15 | 92,546 | 6,170 |
| OKC Energy FC | 15 | 74,249 | 4,950 |
| Saint Louis FC | 15 | 73,841 | 4,923 |
| Richmond Kickers | 15 | 59,941 | 3,996 |
| Tulsa Roughnecks FC | 15 | 59,245 | 3,950 |
| Rochester Rhinos | 15 | 54,820 | 3,655 |
| Charleston Battery | 15 | 53,563 | 3,571 |
| Colorado Springs Switchbacks FC | 15 | 47,284 | 3,152 |
| Wilmington Hammerheads FC | 15 | 44,996 | 3,000 |
| Bethlehem Steel FC | 15 | 38,596 | 2,573 |
| Real Monarchs SLC | 15 | 37,919 | 2,528 |
| Pittsburgh Riverhounds | 15 | 37,412 | 2,494 |
| Portland Timbers 2 | 15 | 34,849 | 2,323 |
| Rio Grande Valley FC | 15 | 29,903 | 1,994 |
| Vancouver Whitecaps FC 2 | 15 | 26,683 | 1,779 |
| Swope Park Rangers KC | 15 | 26,301 | 1,753 |
| Harrisburg City Islanders | 16 | 24,758 | 1,547 |
| Arizona United SC | 15 | 22,046 | 1,470 |
| Seattle Sounders FC 2 | 15 | 21,017 | 1,401 |
| Charlotte Independence | 15 | 20,620 | 1,375 |
| LA Galaxy II | 15 | 18,159 | 1,211 |
| Toronto FC II | 15 | 15,396 | 1,026 |
| Orange County Blues FC | 15 | 15,156 | 1,010 |
| Orlando City B | 15 | 14,363 | 958 |
| New York Red Bulls II | 14 | 8,250 | 589 |
| FC Montreal | 15 | 3,647 | 243 |
| USL TOTAL | 435 | 1,495,977 | 3,439 |
| United Soccer League 2015 | G | Total | Average |
| Sacramento Republic FC | 14 | 158,516 | 11,323 |
| Louisville City FC | 14 | 94,707 | 6,765 |
| Rochester Rhinos | 14 | 77,976 | 5,570 |
| Saint Louis FC | 14 | 68,388 | 4,885 |
| Tulsa Roughnecks FC | 14 | 65,999 | 4,714 |
| Real Monarchs SLC | 14 | 65,770 | 4,698 |
| OKC Energy FC | 14 | 64,895 | 4,635 |
| Charleston Battery | 14 | 57,113 | 4,080 |
| Richmond Kickers | 14 | 52,452 | 3,747 |
| Arizona United SC | 14 | 46,254 | 3,304 |
| Austin Aztex | 14 | 45,171 | 3,227 |
| Portland Timbers 2 | 14 | 43,702 | 3,122 |
| Wilmington Hammerheads FC | 14 | 41,433 | 2,960 |
| Colorado Springs Switchbacks FC | 14 | 38,121 | 2,723 |
| Pittsburgh Riverhounds | 14 | 36,817 | 2,630 |
| Harrisburg City Islanders | 13 | 33,673 | 2,590 |
| Seattle Sounders FC 2 | 14 | 31,100 | 2,221 |
| Charlotte Independence | 14 | 25,205 | 1,800 |
| Vancouver Whitecaps FC 2 | 14 | 23,545 | 1,682 |
| Orange County Blues FC | 14 | 19,573 | 1,398 |
| LA Galaxy II | 13 | 12,602 | 969 |
| New York Red Bulls II | 14 | 8,334 | 595 |
| Toronto FC II | 13 | 6,233 | 479 |
| FC Montreal | 14 | 4,383 | 313 |
| USL TOTAL | 333 | 1,121,962 | 3,369 |
| USL PRO 2014 | G | Total | Average |
| Sacramento Republic FC | 14 | 158,107 | 11,293 |
| Rochester Rhinos | 14 | 74,603 | 5,329 |
| Orlando City SC | 14 | 66,402 | 4,743 |
| OKC Energy FC | 14 | 52,975 | 3,784 |
| Charleston Battery | 14 | 52,786 | 3,770 |
| Pittsburgh Riverhounds | 14 | 37,606 | 2,686 |
| Richmond Kickers | 14 | 37,508 | 2,679 |
| Arizona United SC | 14 | 33,528 | 2,395 |
| Wilmington Hammerheads | 14 | 32,561 | 2,326 |
| Harrisburg City Islanders | 14 | 27,289 | 1,949 |
| Orange County Blues FC | 14 | 10,719 | 766 |
| Charlotte Eagles | 14 | 10,453 | 747 |
| LA Galaxy II | 14 | 8,359 | 597 |
| Dayton Dutch Lions | 14 | 7,455 | 533 |
| MLS Reserve Teams | 6 | 12,668 | 2,111 |
| USL PRO TOTAL | 202 | 623,019 | 3,084 |
| USL PRO 2013 | G | Total | Average |
| Orlando City | 14 | 112,784 | 8,056 |
| Rochester Rhinos | 14 | 82,576 | 5,898 |
| Charleston Battery | 14 | 49,760 | 3,554 |
| Pittsburgh Riverhounds | 14 | 45,816 | 3,273 |
| Wilmington Hammerheads | 14 | 44,269 | 3,162 |
| Richmond Kickers | 14 | 35,381 | 2,527 |
| Phoenix FC Wolves | 14 | 21,454 | 1,532 |
| Harrisburg City Islanders | 14 | 20,386 | 1,456 |
| Charlotte Eagles | 14 | 11,297 | 807 |
| Dayton Dutch Lions | 14 | 10,540 | 753 |
| Los Angeles Blues | 14 | 10,049 | 718 |
| VSI Tampa Bay FC | 14 | 5,295 | 378 |
| MLS Reserve Teams | 10 | 15,116 | 1,512 |
| USL PRO TOTAL | 178 | 464,723 | 2,611 |
| USL PRO 2012 | G | Total | Average |
| Orlando City | 12 | 79,276 | 6,606 |
| Rochester Rhinos | 12 | 75,176 | 6,265 |
| Wilmington Hammerheads | 12 | 51,183 | 4,265 |
| Charleston Battery | 12 | 47,559 | 3,963 |
| Richmond Kickers | 12 | 28,550 | 2,379 |
| Harrisburg City Islanders | 12 | 16,993 | 1,416 |
| Pittsburgh Riverhounds | 12 | 11,810 | 984 |
| Antigua Barracuda FC | 10 | 8,831 | 883 |
| Charlotte Eagles | 12 | 9,348 | 779 |
| Dayton Dutch Lions | 12 | 8,592 | 716 |
| Los Angeles Blues | 12 | 8,247 | 687 |
| USL PRO TOTAL | 130 | 345,565 | 2,658 |
| USL PRO 2011 | G | Total | Average |
| Orlando City | 12 | 64,985 | 5,415 |
| Rochester Rhinos | 12 | 61,672 | 5,139 |
| Wilmington Hammerheads | 12 | 48,640 | 4,053 |
| Charleston Battery | 12 | 42,011 | 3,501 |
| Richmond Kickers | 12 | 23,827 | 1,986 |
| Harrisburg City Islanders | 12 | 16,875 | 1,406 |
| Antigua Barracuda FC | 12 | 15,368 | 1,281 |
| Pittsburgh Riverhounds | 12 | 13,521 | 1,127 |
| Charlotte Eagles | 12 | 12,268 | 1,022 |
| FC New York | 12 | 9,824 | 819 |
| Dayton Dutch Lions | 12 | 7,929 | 661 |
| Los Angeles Blues | 12 | 5,283 | 440 |
| River Plate Puerto Rico | 3 | 570 | 190 |
| Puerto Rico United | 2 | 210 | 105 |
| Sevilla FC Puerto Rico | 1 | 101 | 101 |
| USL PRO TOTALS | 150 | 332,084 | 2,261 |