| Year | Contest Site | Quartet(s) / Rank |
| 2014 | Long Beach | Take Note (5th) |
| 2013 | Orlando | Take Note (9th) |
| 2012 | Tucson | Take Note (7th) |
| 2011 | Las Vegas | Take Note (7th) / SrQ (19th) |
| 2010 | Tampa | Take Note (3rd) / Chicago Times (27th) |
| 2009 | Pasadena | Take Note (3rd) / Chordplay (4th) / Chicago Times (10th) |
| 2008 | San Antonio | Take Note (9th) |
| 2007 | Albuquerque | Chicago Times (6th) / Talismen (7th) / Gadzooks (25th) |
| 2006 | Sacramento | Chicago Times (3rd) / Talismen (6th) / Medium Rare (15th) |
| 2005 | Jacksonville, FL | Savoir Four (2nd) / Talismen (4th) / Gadzooks (19th) |
| 2004 | Biloxi, MS | Savoir Four (5th) / Gadzooks (12th) |
| 2003 | Albuquerque | Gym Class (2nd) |
| 2002 | Riverside, CA | Chicago Shuffle (1st) |
| 2001 | Jacksonville, FL | Chicago Shuffle (2nd) / 4 Sentimental Reasons (14th) |
| 2000 | Tucson | Diminished Capacity (22nd) |
| 1999 | Biloxi, MS | Tri-County Reclamation Project (1st) / Chicago Shuffle (3rd) |
| 1998 | Tampa | Tri-County Reclamation Project (2nd) / Forget Me Notes (9th) / Mellow Fellows (24th) |
| 1997 | Sacramento | Tri-County Reclamation Project (2nd) / Lucky Jordanaires (18th) / Recycled Been (23rd) |
| 1996 | Jacksonville | Tri-County Reclamation Project (3rd) |
| 1995 | Tucson | Forget Me Notes (9th) |
| 1994 | Sarasota | New & Improved Industrial Strength Mini-Chorus (1st) |
| 1993 | Corpus Christi | Grandfather’s Clock (12th) / Recycled Phonics (15th) |
| 1992 | Long Beach | |
| 1991 | Tampa | Old Kids on the Block (1st) / Tom, Dick, and Hairless (12th) |
| 1990 | Tucson | |
| 1989 | Honolulu | Tom, Dick, and Hairless (7th) / Home Town Sound (10th) |
| 1988 | Washington, D.C. | Grandfather’s Clock (2nd) |
| 1987 | Sarasota | Goldenaires (9th) |
| 1986 | Tucson | Sounds of Senility (7th) / Goldenaires (9th) |
