| Club | Based in | Founded | Home ground |
|---|---|---|---|
| AFC Lancaster Lions | — | 2015 | Ephrata High School |
| Evergreen Diplomats | — | 2014 | — |
| Icon FC | — | 2010 | — |
| New Jersey Gladiators SC | — | 2012 | Pascack Valley High School |
| Philadelphia Atoms SC | — | 2017 | — |
| Bethlehem Steel F.C. | Bethlehem | 1907 | — |
| Brooklyn Field Club | New York City | 1898 | — |
| Fall River F.C. | Fall River | 1922 | Mark's Stadium |
| Holyoke Falcos | Holyoke | — | — |
| Jersey City Celtics | Jersey City | 1921 | — |
| Todd Shipyards | New York City | 1921 | — |
| Brookhattan | New York City | 1938 | — |
| Cincinnati Comets | Cincinnati | 1972 | Nippert Stadium |
| Columbus Magic | Columbus | 1979 | — |
| Connecticut Yankees | Hartford | 1972 | Trinity Health Stadium |
| Detroit Express | — | 1981 | Pontiac Silverdome |
| Fall River S.C. | Fall River | 1957 | — |
| Hartford S.C. | Hartford | — | — |
| Las Vegas Seagulls | Las Vegas | 1979 | Sam Boyd Stadium |
| Nashville Diamonds | Nashville | 1982 | — |
| Philadelphia Ukrainians | Philadelphia | 1950 | — |
| Rochester Flash | Rochester | 1981 | Holleder Memorial Stadium |
| Southern California Lazers | Torrance | 1978 | — |
| Uhrik Truckers | Philadelphia | 1933 | — |
| Utah Golden Spikers | Salt Lake City | 1976 | — |