American soccer writing, history & data.
| Team | Location | Years |
|---|---|---|
| Racine City | Racine, WI | 1914–1915 |
| Racine Silver Moon S.F.C. | Racine, WI | 1913–1914 |
| Racine United | Racine, WI | 1913–1913 |
| Raiders | St. Louis, MO | 1947–1948 |
| Raiders | St. Louis, MO | 1951–1952 |
| Raleigh Capital Express | Raleigh, NC | 1999–2000 |
| Raleigh Capital Express | - | 1993 |
| Raleigh Flyers | Raleigh, NC | 1993–1998 |
| Raleigh Wings | Raleigh, NC | 1998–2000 |
| Rambler S.F.C. | Kenosha, WI | 1913–1914 |
| Rangers | St. Louis, MO | 1905–1907 |
| Rangers' F. and A.C. | Alameda, CA | 1911–1913 |
| Rangers F.C. | Alameda, CA | 1914–1921 |
| Raticans | St. Louis, MO | 1926–1927 |
| Rawlings | St. Louis, MO | 1903–1905 |
| Ray Dohle, Inc. | St. Louis, MO | 1949–1950 |
| Rayo OKC | - | 2016 |
| Reading Rage | Reading, PA | 1996–2009 |
| Reading United A.C. | - | 1996 |
| Real Boston Rams | - | 2013 |
| Real Colorado Cougars | - | 2000 |
| Real Colorado Foxes | - | 2009 |
| Real Del Mar | - | 1998 |
| Real Maryland F.C. | - | 2008 |
| Real Monarchs SLC | - | 2015 |
| Real Phoenix FC | - | 2012 |
| Real Salt Lake | - | 2005 |
| Real Salt Lake Women | - | 2008 |
| Real San Jose | - | 2007 |
| Real Santa Barbara | Santa Barbara, CA | 1989–1990 |
| Real Shore FC | - | 2007 |
| Red Bull New York | - | 1994 |
| Red Star F.C. | New York, NY | 1894–1894 |
| Redwood City Ruckus | - | 2006 |
| Reisterstown | Reisterstown, MD | 1948–1949 |
| Reliance | Milwaukee, WI | 1921–1922 |
| Reno 1868 FC | - | 2017 |
| Reno Rattlers | Reno, NV | 1994–1998 |
| Reno Zephyrs FC | - | 1999 |
| Rhode Island Oceaneers | Providence, RI | 1974–1976 |
| Rhode Island Rays | Warren, RI | 1996–2004 |
| Rhode Island Rays | - | 1994–2004 |
| Rhode Island Reds FC | - | 2012 |
| Rhode Island Reds FC | - | 2014 |
| Rhode Island Stingrays | East Providence, RI | 1994–1995 |
| Rhode Island Stingrays | East Providence, RI | 1995–2009 |
| Richardson Rockets | Richardson, TX | 1989–1992 |
| Richmond Kickers | Richmond, VA | 1993 |
| Richmond Kickers Destiny | - | 2004 |
| Richmond Kickers Future | - | 2002 |
| Richmond Strikers | - | 2013 |
| Richmond Strikers | - | 2015 |
| Rio Grande Valley Bravos FC | - | 2009 |
| Rio Grande Valley FC Toros | - | 2016 |
| Rio Grande Valley Grandes | - | 2011 |
| River Cities Futbol Club | - | 2004 |
| Riverdale | Kenosha, WI | 1917–1918 |
| Riverside County Elite | - | 2000 |
| Roanoke RiverDawgs | Roanoke, VA | 1995–1996 |
| Roanoke Wrath | Roanoke, VA | 1997–2000 |
| Robert Burns F.C. | West New York, NJ | 1906–1907 |
| Robins Dry Dock F.C. | Brooklyn, NY | 1918–1921 |
| Rochester Flash | Rochester, NY | 1981–1984 |
| Rochester Lancers | Rochester, NY | 1967–1980 |
| Rochester Lancers | - | 2011 |
| Rochester Raging Rhinos | Rochester, NY | 1996–2007 |
| Rochester Ravens | Rochester, NY | 1996–2005 |
| Rochester Reign | - | 2004 |
| Rochester Rhinos | Rochester, NY | 2008 |
| Rochester River Dogz FC | - | 2016 |
| Rochester Thunder | - | 2009 |
| Rock Church | St. Louis, MO | 1910–1914 |
| Rocket City United | - | 2008 |
| Rockford 'Dactyls | Rockford, IL | 1995–2000 |
| Rockford Rampage | - | 2005 |
| Rockford Raptors | Rockford, IL | 1994–2000 |
| Rockford Raptors FC | - | 1994 |
| Roma Sport Club | Paterson, NJ | 1955–1969 |
| Root's Restaurant | Baltimore, MD | 1951–1952 |
| Ruggiero's Cafe S.C. | Baltimore, MD | 1943–1946 |
| Rush Salt Lake City | - | 2007 |
| Rustless Iron and Steel Corp. | Baltimore, MD | 1942–1943 |
| RWB Adria | Chicago, IL | 1959 |