| New Orleans Storm | A-League | New Orleans | 1993 | Shrine on Airline |
| New Vibes | U.S. Virgin Islands Championship | — | — | Lionel Roberts Park |
| New York Americans | American Soccer League | — | 1931 | — |
| New York Apollo | German-American Soccer League | New York City | 1950 | — |
| New York Centaurs | A-League | Randalls Island | 1994 | Downing Stadium |
| New York City FC | Major League Soccer | New York City | May 21, 2013 | Yankee Stadium |
| New York Cosmos | National Independent Soccer Association | New York City | August 1, 2010 | Maimonides Park |
| New York Cosmos | North American Soccer League | New York City | 1970 | Giants Stadium |
| New York Cosmos | USL League One | Paterson | 2025 | Hinchliffe Stadium |
| New York Cosmos B | National Premier Soccer League | — | 2015 | Mitchel Athletic Complex |
| New York Eagles | — | New York City | 1978 | — |
| New York Field Club | — | New York City | 1916 | — |
| New York Fury | Women's Premier Soccer League Elite | — | 2011 | James M. Shuart Stadium |
| New York Giants | — | New York City | 1894 | — |
| New York Hakoah | North Jersey Soccer League | New York City | 2009 | — |
| New York Hungaria | Cosmopolitan Soccer League | New York City | 1923 | — |
| New York International FC | — | New York City | 2019 | — |
| New York Pancyprian-Freedoms | Cosmopolitan Soccer League | New York City | 1974 | Belson Stadium |
| New York Power | Women's United Soccer Association | Uniondale | 2000 | Mitchel Athletic Complex |
| New York Skyliners | — | New York City | 1966 | Yankee Stadium |
| Newark Americans | — | Newark | 1930 | — |
| Newark Ukrainian Sitch | — | Newark | 1924 | — |
| NJ-LUSO Rangers FC | USL League Two | — | 2007 | Morris Catholic High School |
| NorCal Lamorinda United SC | National Premier Soccer League | — | 2009 | Miramonte High School |
| Norfolk SharX | — | — | 2011 | Norfolk Scope |
| North Carolina Courage | National Women's Soccer League | Cary | 2017 | WakeMed Soccer Park |
| North Carolina FC | USL Championship | Cary | January 26, 2006 | WakeMed Soccer Park |
| North Jersey Imperials | USL First Division, USL Second Division, USL League Two | — | 1994 | — |
| North Jersey Valkyries | USL W-League | Wayne | 2009 | DePaul Catholic High School |
| Northern Arizona Prospectors | USL League Two | Arizona | 1998 | Bradshaw Mountain High School |
| Northern Colorado Cutthroats | Premier Arena Soccer League | — | 2007 | — |
| Northern Colorado Hailstorm FC | The League for Clubs, USL League One | — | January 12, 2021 | — |
| Northern Nevada Aces | National Premier Soccer League | — | 2001 | — |
| Northern Virginia FC | USL League Two | — | 1998 | — |
| NSC United | National Premier Soccer League | — | 2005 | — |
| NTX Rayados | — | Dallas | 2011 | — |
| Oakland Buccaneers | — | Oakland | 1976 | — |
| Oakland Clippers | National Professional Soccer League | Oakland | 1966 | Oakland Coliseum |
| Oakland Roots SC | USL Championship | Oakland | 2018 | Oakland Coliseum |
| Oakland Stompers | North American Soccer League | Oakland | 1978 | Oakland Coliseum |
| OC Blues Strikers FC | USL League Two | — | 2011 | — |
| Ocala Stampede | USL League Two | Ocala | 2012 | — |
| Ocean City Nor'easters | USL League Two | Ocean City | 1996 | Carey Stadium |
| Ogden City SC | USL League Two | Ogden | — | — |
| Ohio Vortex | Major Arena Soccer League | — | 2009 | — |
| OKC Energy FC | USL Championship | Oklahoma City | July 2, 2013 | Taft Stadium |
| Oklahoma Alliance | Women's Premier Soccer League | — | 2007 | — |
| Oklahoma City FC | Women's Premier Soccer League | — | 2007 | — |