Referees from United States
| Kevin Stott | Hometown: Los Angeles (CA) | Intl. since: 1995 |
| Terry Vaughn | Hometown: Mt. Vernon (IA) | Intl. since: 2004 |
| Baldomero Toledo | Hometown: Rancho Cucamonga (CA) | Intl. since: 2007 |
| Brian Hall | Hometown: California | Intl. since: 1992 |
| Esse Baharmast | Hometown: | Intl. since: |
| Arturo Angeles | Hometown: | Intl. since: 1989 |
| Jair Marrufo | Hometown: El Paso | Intl. since: 2007 |
| Timothy Weyland | Hometown: East Bay, Ca | Intl. since: 1995 |
| Ricardo Valenzuela | Hometown: Richmond (ca) | Intl. since: 1999 |
| Ali Saheli | Hometown: Columbia (Mo) | Intl. since: 2000 |
| Michael Kennedy | Hometown: | Intl. since: 1999 |
| Mark Geiger | Hometown: Beachwood NJ | Intl. since: |
| Alex Prus | Hometown: Simpsonville, SC | Intl. since: 2004 |
| Ricardo Salazar | Hometown: Elgin, Ill | Intl. since: 2005 |
| Vincent Mauro | Hometown: | Intl. since: 1986 |
| David Socha | Hometown: Ludlow | Intl. since: 1979 |
| Henry Landauer | Hometown: San Rafael, Cal | Intl. since: 1964 |
| Robert Evans | Hometown: Dallas | Intl. since: 1979 |
| Edward Bellion | Hometown: Grapevine, Texas | Intl. since: 1980 |
| Raul J. Dominguez | Hometown: | Intl. since: 1990 |
| Michael Wuertz | Hometown: Wisconsin | Intl. since: |
| Dilvo Di Placido | Hometown: | Intl. since: 1985 |
| Angelo Bratsis | Hometown: Massachusetts | Intl. since: 1980 |
| John Orr Best | Hometown: Inglewood | Intl. since: |
| John Chandler | Hometown: | Intl. since: |
| John Williams | Hometown: | Intl. since: |
| Edward Donaghy | Hometown: | Intl. since: |
| Helder Dias | Hometown: | Intl. since: 1993 |
| Prudencio Garcia | Hometown: St Louis | Intl. since: 1949 |
| Stan Lutostanski | Hometown: St Louis | Intl. since: |
| Toros Kibritjian | Hometown: L A / Monterrey Park | Intl. since: 1968 |
| Leo Goldstein | Hometown: New York | Intl. since: |
| Richard K Giebner | Hometown: Chicago / Tucson | Intl. since: 1960 |
| Larry King | Hometown: Hazelwood, Missouri | Intl. since: 1965 |
| John Di Salvatore | Hometown: Brooklyn, NY | Intl. since: 1966 |
| Roger Schott | Hometown: Philadephia | Intl. since: 1962 |
| Gino D'Ippolito | Hometown: New York | Intl. since: |
| Gus Constantine | Hometown: Mamaroneck | Intl. since: 1983 |
| Edvin Jurisevic | Hometown: | Intl. since: 2010 |
| Julio Salas | Hometown: | Intl. since: |
| Sam Galin | Hometown: New York | Intl. since: |
| Majid Jay | Hometown: Los Alamitos | Intl. since: 1989 |
| Jack D'Aquila | Hometown: | Intl. since: |
| Zimmerman Boulos | Hometown: Jacksonville | Intl. since: |
| James Black | Hometown: New Jersey | Intl. since: |
| Joshua Patlak | Hometown: Santa Barbara | Intl. since: 1994 |
| Eli Korer | Hometown: Chicago | Intl. since: |
| James McLean | Hometown: New York | Intl. since: |
| Bill Rose | Hometown: Philadelphia | Intl. since: |
| George McFalls | Hometown: Pennsylvania | Intl. since: |
| Nels Dahlquist | Hometown: Chicago | Intl. since: |
| Harry Sickles | Hometown: Monongahelia (Pen) | Intl. since: |
| Raymond Kraft | Hometown: Baltimore | Intl. since: |
| Harry Nowick | Hometown: Newark | Intl. since: 1958 |
| Jack Ramos | Hometown: Carnegie | Intl. since: |
| Harry Rodgers | Hometown: Philadelphia | Intl. since: |
| Hans Buckheim | Hometown: San Francisco | Intl. since: |
| David MacKenzie | Hometown: San Pedro | Intl. since: |
| Harry Rogers | Hometown: Philadelphia | Intl. since: |
| John Woods | Hometown: San Francisco | Intl. since: |
| Thomas Callaghan | Hometown: Queens, NY | Intl. since: |
| Harry Crawford | Hometown: St Louis | Intl. since: |
| Daniel Lieberman | Hometown: Cleveland | Intl. since: |
| Thomas M Syme | Hometown: Detroit | Intl. since: |
| William Peters | Hometown: Passaic (NY) | Intl. since: |
| Frank Hasek | Hometown: Concord (NH) | Intl. since: |
| John W Pitchok | Hometown: Pittsburgh | Intl. since: |
| Michael Wurtz | Hometown: Milwaukee | Intl. since: |
| Ernest Dingesz | Hometown: Chicago | Intl. since: |
| Antonio Nobile | Hometown: New York | Intl. since: |
| Howard Krollfeifer jr | Hometown: Cedar Grove NJ | Intl. since: |
| Richard Grady | Hometown: | Intl. since: |
| Kari Seitz | Hometown: | Intl. since: 1999 |
| Alfred Kleinaitis | Hometown: | Intl. since: |
| Donald Dellavia | Hometown: | Intl. since: |
| Edwin Resendes | Hometown: | Intl. since: |
| Elias Bazakos | Hometown: Minneapolis | Intl. since: 2012 |
| Juan Guzman | Hometown: | Intl. since: 2013 |
| Christopher Penso | Hometown: | Intl. since: 2013 |
| Kevin Terry Jr. | Hometown: | Intl. since: |
| Armando Villarreal | Hometown: | Intl. since: 2015 |
| Margaret Domka | Hometown: | Intl. since: 2007 |
| Robert Sibiga | Hometown: | Intl. since: |
| Ismail Elfath | Hometown: | Intl. since: 2016 |
| Ted Unkel | Hometown: | Intl. since: 2016 |
| Rubiel Vazquez | Hometown: | Intl. since: |
| Nima Saghafi | Hometown: | Intl. since: |
| Danielle Chesky | Hometown: | Intl. since: |
| Malik Badawi | Hometown: | Intl. since: |
| Natalie Simon | Hometown: | Intl. since: |
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