The Academy of Country Music has had a spotty history in allowing duos into the Vocal Group category with some years separating into two separate awards. The following is the complete list of ACM Award winners for Vocal Group of the Year:
- 1965 - Bonnie Owens & Merle Haggard
- 1966 - Bonnie Owens & Merle Haggard
- 1967 - Sons of the Pioneers
- 1968 - Johnny & Jonie Mosby
- 1969 - Kimberleys
- 1970 - Kimberleys
- 1971 - Conway Twitty & Loretta Lynn
- 1972 - Statler Brothers
- 1973 - Brush Arbor
- 1974 - Conway Twitty & Loretta Lynn
- 1975 - Conway Twitty & Loretta Lynn
- 1976 - Conway Twitty & Loretta Lynn
- 1977 - Statler Brothers
- 1978 - Oak Ridge Boys
- 1979 - Moe Bandy & Joe Stampley
- 1980 - Alabama
- 1981 - Alabama
- 1982 - Alabama
- 1983 - Alabama
- 1984 - Alabama
- 1985 - Alabama
- 1986 - Forester Sisters
- 1987 - Highway 101
- 1988 - Highway 101
- 1989 - Restless Heart
- 1990 - Shenandoah
- 1991 - Diamond Rio
- 1992 - Diamond Rio
- 1993 - Little Texas
- 1994 - The Mavericks
- 1995 - The Mavericks
- 1996 - Sawyer Brown
- 1997 - Brooks & Dunn
- 1998 - Dixie Chicks
- 1999 - Dixie Chicks
- 2000 - Dixie Chicks
- 2001 - Lonestar
- 2002 - Rascal Flatts
- 2003 - Rascal Flatts
- 2004 - Rascal Flatts
- 2005 - Rascal Flatts
- 2006 - Rascal Flatts
- 2007 - Rascal Flatts
- 2008 - Rascal Flatts
- 2009 - Lady Antebellum
- 2010 - Lady Antebellum
- 2011 - Lady Antebellum
- 2012 - Little Big Town
- 2013 - The Band Perry
- 2014 - Little Big Town
- 2015 - Little Big Town
- 2016 - Little Big Town
- 2017 - Old Dominion
The following are the winners for Best Vocal Duo in years where it was offered as a separate category:
- 1967 - Bonnie Owens & Merle Haggard
- 1980 - Moe Bandy & Joe Stampley
- 1981 - David Frizzell & Shelly West
- 1982 - David Frizzell & Shelly West
- 1983 - Kenny Rogers & Dolly Parton
- 1984 - The Judds
- 1985 - The Judds
- 1986 - The Judds
- 1987 - The Judds
- 1988 - The Judds
- 1989 - The Judds
- 1990 - The Judds
- 1991 - Brooks & Dunn
- 1992 - Brooks & Dunn
- 1993 - Brooks & Dunn
- 1994 - Brooks & Dunn
- 1995 - Brooks & Dunn
- 1996 - Brooks & Dunn
- 2000 - Brooks & Dunn
- 2001 - Brooks & Dunn
- 2002 - Brooks & Dunn
- 2003 - Brooks & Dunn
- 2004 - Brooks & Dunn
- 2005 - Brooks & Dunn
- 2006 - Brooks & Dunn
- 2007 - Brooks & Dunn
- 2008 - Sugarland
- 2009 - Brooks & Dunn
- 2010 - Sugarland
- 2011 - Thompson Square
- 2012 - Thompson Square
- 2013 - Florida Georgia Line
- 2014 - Florida Georgia Line
- 2015 - Florida Georgia Line
- 2016 - Brothers Osborne
- 2017 - Brothers Osborne
Most wins across both categories:
- Brooks & Dunn (16)
- The Judds (7)
- Rascal Flatts (7)
- Alabama (6)
- Conway Twitty & Loretta Lynn (4)
- Little Big Town (4)
- Bonnie Owens & Merle Haggard (3)
- Dixie Chicks (3)
- Lady Antebellum (3)
- Florida Georgia Line (3)