Just curious - why do you ask?
Well asuming you mean American commercial recordings.
You could start with the Grammy Award page - and search the Folk catagories....HERE are some examples .... you can par-mutate the listings into many more catagories.
http://www.grammy.com/awards/search/index.html
FOLK - FOLK gives you:
GRAMMY Winner Joni Mitchell,artist.
Genre Folk
GRAMMY Category Best Folk Performance
Year 1969 - 12th Annual GRAMMY Awards
Title of the Work Clouds
Artist Performing Work Joni Mitchell
GRAMMY Winner Judy Collins,artist.
Genre Folk
GRAMMY Category Best Folk Performance
Year 1968 - 11th Annual GRAMMY Awards
Title of the Work Both Sides Now (Single)
Artist Performing Work Judy Collins
GRAMMY Winner John Hartford,artist.
Genre Folk
GRAMMY Category Best Folk Performance
Year 1967 - 10th Annual GRAMMY Awards
Title of the Work Gentle On My Mind (Single)
Artist Performing Work John Hartford
GRAMMY Winner Cortelia Clark,artist.
Genre Folk
GRAMMY Category Best Folk Recording
Year 1966 - 9th Annual GRAMMY Awards
Title of the Work Blues In The Street
Artist Performing Work Cortelia Clark
GRAMMY Winner Harry Belafonte & Miriam Makeba,artists.
Genre Folk
GRAMMY Category Best Folk Recording
Year 1965 - 8th Annual GRAMMY Awards
Title of the Work An Evening With Belafonte/Makeba (Album)
Artist Performing Work Harry Belafonte, Miriam Makeba
GRAMMY Winner Gale Garnett,artist.
Genre Folk
GRAMMY Category Best Folk Recording
Year 1964 - 7th Annual GRAMMY Awards
Title of the Work We'll Sing In The Sunshine
Artist Performing Work Gale Garnett
GRAMMY Winner Peter Paul And Mary (Paul Stooky, Mary Travers, Peter Yarrow),artist.
Genre Folk
GRAMMY Category Best Folk Recording
Year 1963 - 6th Annual GRAMMY Awards
Title of the Work Blowin' In The Wind
Artist Performing Work Peter, Paul And Mary
GRAMMY Winner Peter Paul And Mary (Paul Stooky, Mary Travers, Peter Yarrow),artist.
Genre Folk
GRAMMY Category Best Folk Recording
Year 1962 - 5th Annual GRAMMY Awards
Title of the Work If I Had A Hammer
Artist Performing Work Peter, Paul And Mary
GRAMMY Winner Belafonte Folk Singers,artist.
Genre Folk
GRAMMY Category Best Folk Recording
Year 1961 - 4th Annual GRAMMY Awards
Title of the Work Belafonte Folk Singers At Home And Abroad
Artist Performing Work Belafonte Folk Singers
GRAMMY Winner Harry Belafonte,artist.
Genre Folk
GRAMMY Category Best Performance - Folk
Year 1960 - 3rd Annual GRAMMY Awards
Title of the Work Swing Dat Hammer
Artist Performing Work Harry Belafonte
GRAMMY Winner Kingston Trio (Nick Reynolds, Bob Shane),artist.
Genre Folk
GRAMMY Category Best Performance - Folk
Year 1959 - 2nd Annual GRAMMY Awards
Title of the Work The Kingston Trio At Large
Artist Performing Work The Kingston Trio
FOLK - TRADITIONAL FOLK gives you:
GRAMMY Winner T Bone Burnett,producer. Various Artists,artist. Mike Piersante,engineer.
Genre Folk
GRAMMY Category Best Traditional Folk Album
Year 2001 - 44th Annual GRAMMY Awards
Title of the Work Down From The Mountain
Artist Performing Work (Various Artists)
GRAMMY Winner Dave Alvin,artist. Mark Linett,engineer. Dave Alvin,producer.
Genre Folk
GRAMMY Category Best Traditional Folk Album
Year 2000 - 43rd Annual GRAMMY Awards
Title of the Work Public Domain - Songs From The Wild Land (Album)
Artist Performing Work Dave Alvin
GRAMMY Winner June Carter Cash,artist.
Genre Folk
GRAMMY Category Best Traditional Folk Album
Year 1999 - 42nd Annual GRAMMY Awards
Title of the Work Press On (Album)
Artist Performing Work June Carter Cash
GRAMMY Winner Chieftains (Derek Bell, Kevin Conneff, Martin Fay, Sean Keane, Matt Molloy, Paddy Moloney),artist.
Genre Folk
GRAMMY Category Best Traditional Folk Album
Year 1998 - 41st Annual GRAMMY Awards
Title of the Work Long Journey Home (Album)
Artist Performing Work The Chieftains With Various Artists
GRAMMY Winner Beausoleil (Tommy Alesi, Jimmy Breaux, David Doucet, Michael Doucet, Al Tharp, Billy Ware),artist.
Genre Folk
GRAMMY Category Best Traditional Folk Album
Year 1997 - 40th Annual GRAMMY Awards
Title of the Work L'amour Ou La Folie (Album)
Artist Performing Work BeauSoleil
GRAMMY Winner Pete Seeger,artist.
Genre Folk
GRAMMY Category Best Traditional Folk Album
Year 1996 - 39th Annual GRAMMY Awards
Title of the Work Pete (Album)
Artist Performing Work Pete Seeger
GRAMMY Winner Ramblin' Jack Elliott,artist.
Genre Folk
GRAMMY Category Best Traditional Folk Album
Year 1995 - 38th Annual GRAMMY Awards
Title of the Work South Coast (Album)
Artist Performing Work Ramblin' Jack Elliott
GRAMMY Winner Bob Dylan,artist.
Genre Folk
GRAMMY Category Best Traditional Folk Album
Year 1994 - 37th Annual GRAMMY Awards
Title of the Work World Gone Wrong (Album)
Artist Performing Work Bob Dylan
GRAMMY Winner Chieftains (Derek Bell, Kevin Conneff, Martin Fay, Sean Keane, Matt Molloy, Paddy Moloney),artist.
Genre Folk
GRAMMY Category Best Traditional Folk Album
Year 1993 - 36th Annual GRAMMY Awards
Title of the Work The Celtic Harp (Album)
Artist Performing Work The Chieftains
GRAMMY Winner Chieftains (Derek Bell, Kevin Conneff, Martin Fay, Sean Keane, Matt Molloy, Paddy Moloney),artist.
Genre Folk
GRAMMY Category Best Traditional Folk Album
Year 1992 - 35th Annual GRAMMY Awards
Title of the Work An Irish Evening Live At The Grand Opera House, Belfast (Album)
Artist Performing Work The Chieftains
GRAMMY Winner John Colby & Ken Burns,producers.
Genre Folk
GRAMMY Category Best Traditional Folk Album
Year 1991 - 34th Annual GRAMMY Awards
Title of the Work The Civil War (Original Soundtrack Recording) (Album)
Artist Performing Work (Various Artists)
GRAMMY Winner Doc Watson,artist.
Genre Folk
GRAMMY Category Best Traditional Folk Recording
Year 1990 - 33rd Annual GRAMMY Awards
Title of the Work On Praying Ground (Album)
Artist Performing Work Doc Watson
GRAMMY Winner Marcel Cellier,producer.
Genre Folk
GRAMMY Category Best Traditional Folk Recording
Year 1989 - 32nd Annual GRAMMY Awards
Title of the Work Le Mystere Des Voix Bulgares, Vol. II (Album)
Artist Performing Work (Bulgarian State Female Vocal Choir)
GRAMMY Winner Don DeVito, Harold Leventhal, Joe McEwen & Ralph Rinzler,producers.
Genre Folk
GRAMMY Category Best Traditional Folk Recording
Year 1988 - 31st Annual GRAMMY Awards
Title of the Work Folkways: A Vision Shared - A Tribute To Woody Guthrie And Leadbelly (Album)
Artist Performing Work (Various Artists)
GRAMMY Winner Ladysmith Black Mambazo,artist.
Genre Folk
GRAMMY Category Best Traditional Folk Recording
Year 1987 - 30th Annual GRAMMY Awards
Title of the Work Shaka Zulu (Album)
Artist Performing Work Ladysmith Black Mambazo
GRAMMY Winner Doc Watson,artist.
Genre Folk
GRAMMY Category Best Traditional Folk Recording
Year 1986 - 29th Annual GRAMMY Awards
Title of the Work Riding The Midnight Train (Album)
Artist Performing Work Doc Watson
GRAMMY Winner Rockin' Sidney,artist.
Genre Folk
GRAMMY Category Best Ethnic Or Traditional Folk Recording
Year 1985 - 28th Annual GRAMMY Awards
Title of the Work My Toot Toot (Single)
Artist Performing Work Rockin' Sidney
GRAMMY Winner Elizabeth Cotten,artist.
Genre Folk
GRAMMY Category Best Ethnic Or Traditional Folk Recording
Year 1984 - 27th Annual GRAMMY Awards
Title of the Work Elizabeth Cotten Live! (Album)
Artist Performing Work Elizabeth Cotten
GRAMMY Winner Clifton Chenier,artist.
Genre Folk
GRAMMY Category Best Ethnic Or Traditional Folk Recording
Year 1983 - 26th Annual GRAMMY Awards
Title of the Work I'm Here (Album)
Artist Performing Work Clifton Chenier And his Red Hot Louisiana Band
GRAMMY Winner Queen Ida (Guillary),artist.
Genre Folk
GRAMMY Category Best Ethnic Or Traditional Folk Recording
Year 1982 - 25th Annual GRAMMY Awards
Title of the Work Queen Ida And The Bon Temps Zydeco Band On Tour
Artist Performing Work Queen Ida
GRAMMY Winner B.B. King,artist.
Genre Folk
GRAMMY Category Best Ethnic Or Traditional Recording
Year 1981 - 24th Annual GRAMMY Awards
Title of the Work There Must Be A Better World Somewhere (Album)
Artist Performing Work B.B. King
GRAMMY Winner Norman Dayron,producer.
Genre Folk
GRAMMY Category Best Ethnic Or Traditional Recording
Year 1980 - 23rd Annual GRAMMY Awards
Title of the Work Rare Blues (Album)
Artist Performing Work (Various Artists)
GRAMMY Winner Muddy Waters,artist.
Genre Folk
GRAMMY Category Best Ethnic Or Traditional Recording
Year 1979 - 22nd Annual GRAMMY Awards
Title of the Work Muddy "Mississippi" Waters Live (Album)
Artist Performing Work Muddy Waters
GRAMMY Winner Muddy Waters,artist.
Genre Folk
GRAMMY Category Best Ethnic Or Traditional Recording
Year 1978 - 21st Annual GRAMMY Awards
Title of the Work I'm Ready (Album)
Artist Performing Work Muddy Waters
GRAMMY Winner Muddy Waters,artist.
Genre Folk
GRAMMY Category Best Ethnic Or Traditional Recording
Year 1977 - 20th Annual GRAMMY Awards
Title of the Work Hard Again (Album)
Artist Performing Work Muddy Waters
GRAMMY Winner John Hartford,artist.
Genre Folk
GRAMMY Category Best Ethnic Or Traditional Recording
Year 1976 - 19th Annual GRAMMY Awards
Title of the Work Mark Twang (Album)
Artist Performing Work John Hartford
GRAMMY Winner Muddy Waters,artist.
Genre Folk
GRAMMY Category Best Ethnic Or Traditional Recording
Year 1975 - 18th Annual GRAMMY Awards
Title of the Work The Muddy Waters Woodstock Album (Album)
Artist Performing Work Muddy Waters
GRAMMY Winner Doc Watson & Merle Watson,artists.
Genre Folk
GRAMMY Category Best Ethnic Or Traditional Recording
Year 1974 - 17th Annual GRAMMY Awards
Title of the Work Two Days In November (Album)
Artist Performing Work Merle Watson, Doc Watson
GRAMMY Winner Doc Watson,artist.
Genre Folk
GRAMMY Category Best Ethnic Or Traditional Recording (Including Traditional Blues)
Year 1973 - 16th Annual GRAMMY Awards
Title of the Work Then And Now (Album)
Artist Performing Work Doc Watson
GRAMMY Winner Muddy Waters,artist.
Genre Folk
GRAMMY Category Best Ethnic Or Traditional Recording (Including Traditional Blues)
Year 1972 - 15th Annual GRAMMY Awards
Title of the Work The London Muddy Waters Session (Album)
Artist Performing Work Muddy Waters
GRAMMY Winner Muddy Waters,artist.
Genre Folk
GRAMMY Category Best Ethnic Or Traditional Recording
Year 1971 - 14th Annual GRAMMY Awards
Title of the Work They Call Me Muddy Waters
Artist Performing Work Muddy Waters
GRAMMY Winner T-Bone (Aaron) Walker,artist.
Genre Folk
GRAMMY Category Best Ethnic Or Traditional Recording (Including Traditional Blues)
Year 1970 - 13th Annual GRAMMY Awards
Title of the Work Good Feelin'
Artist Performing Work T. Bone Walker
FOLK - CONTEMPORARY FOLK gives you:
GRAMMY Winner Bob Dylan,artist. Chris Shaw,engineer. Bob Dylan,producer.
Genre Folk
GRAMMY Category Best Contemporary Folk Album
Year 2001 - 44th Annual GRAMMY Awards
Title of the Work Love And Theft
Artist Performing Work Bob Dylan
GRAMMY Winner Emmylou Harris,artist. Jim Watts & Malcolm Burn,engineers. Malcolm Burn,producer.
Genre Folk
GRAMMY Category Best Contemporary Folk Album
Year 2000 - 43rd Annual GRAMMY Awards
Title of the Work Red Dirt Girl (Album)
Artist Performing Work Emmylou Harris
GRAMMY Winner Tom Waits,artist.
Genre Folk
GRAMMY Category Best Contemporary Folk Album
Year 1999 - 42nd Annual GRAMMY Awards
Title of the Work Mule Variations (Album)
Artist Performing Work Tom Waits
GRAMMY Winner Lucinda Williams,artist.
Genre Folk
GRAMMY Category Best Contemporary Folk Album
Year 1998 - 41st Annual GRAMMY Awards
Title of the Work Car Wheels On A Gravel Road (Album)
Artist Performing Work Lucinda Williams
GRAMMY Winner Bob Dylan,artist.
Genre Folk
GRAMMY Category Best Contemporary Folk Album
Year 1997 - 40th Annual GRAMMY Awards
Title of the Work Time Out Of Mind (Album)
Artist Performing Work Bob Dylan
GRAMMY Winner Bruce Springsteen,artist.
Genre Folk
GRAMMY Category Best Contemporary Folk Album
Year 1996 - 39th Annual GRAMMY Awards
Title of the Work The Ghost Of Tom Joad (Album)
Artist Performing Work Bruce Springsteen
GRAMMY Winner Emmylou Harris,artist.
Genre Folk
GRAMMY Category Best Contemporary Folk Album
Year 1995 - 38th Annual GRAMMY Awards
Title of the Work Wrecking Ball (Album)
Artist Performing Work Emmylou Harris
GRAMMY Winner Johnny Cash,artist.
Genre Folk
GRAMMY Category Best Contemporary Folk Album
Year 1994 - 37th Annual GRAMMY Awards
Title of the Work American Recordings (Album)
Artist Performing Work Johnny Cash
GRAMMY Winner Nanci Griffith,artist.
Genre Folk
GRAMMY Category Best Contemporary Folk Album
Year 1993 - 36th Annual GRAMMY Awards
Title of the Work Other Voices/Other Rooms (Album)
Artist Performing Work Nanci Griffith
GRAMMY Winner Chieftains (Derek Bell, Kevin Conneff, Martin Fay, Sean Keane, Matt Molloy, Paddy Moloney),artist.
Genre Folk
GRAMMY Category Best Contemporary Folk Album
Year 1992 - 35th Annual GRAMMY Awards
Title of the Work Another Country (Album)
Artist Performing Work The Chieftains
GRAMMY Winner John Prine,artist.
Genre Folk
GRAMMY Category Best Contemporary Folk Album
Year 1991 - 34th Annual GRAMMY Awards
Title of the Work The Missing Years (Album)
Artist Performing Work John Prine
GRAMMY Winner Shawn Colvin,artist.
Genre Folk
GRAMMY Category Best Contemporary Folk Recording
Year 1990 - 33rd Annual GRAMMY Awards
Title of the Work Steady On (Album)
Artist Performing Work Shawn Colvin
GRAMMY Winner Indigo Girls (Amy Ray, Emily Saliers),artist.
Genre Folk
GRAMMY Category Best Contemporary Folk Recording
Year 1989 - 32nd Annual GRAMMY Awards
Title of the Work Indigo Girls (Album)
Artist Performing Work Indigo Girls
GRAMMY Winner Tracy Chapman,artist.
Genre Folk
GRAMMY Category Best Contemporary Folk Recording
Year 1988 - 31st Annual GRAMMY Awards
Title of the Work Tracy Chapman (Album)
Artist Performing Work Tracy Chapman
GRAMMY Winner Steve Goodman,artist.
Genre Folk
GRAMMY Category Best Contemporary Folk Recording
Year 1987 - 30th Annual GRAMMY Awards
Title of the Work Unfinished Business (Album)
Artist Performing Work Steve Goodman
GRAMMY Winner Al Bunetta, Dan Einstein & Hank Neuberger,producers.
Genre Folk
GRAMMY Category Best Contemporary Folk Recording
Year 1986 - 29th Annual GRAMMY Awards
Title of the Work Tribute To Steve Goodman (Album)
Artist Performing Work (Arlo Guthrie, John Hartford, Richie Havens, Bonnie Koloc, Nitty Gritty Dirt Band, John Prine, And Others)
FOLK -NATIVE AMERICAN FOLK gives you:
GRAMMY Winner Johnny Mike & Verdell Primeaux,artists. Jack Miller,engineer. Giuli Doyle & Robert Doyle,producers.
Genre Folk
GRAMMY Category Best Native American Music Album
Year 2001 - 44th Annual GRAMMY Awards
Title of the Work Bless The People - Harmonized Peyote Songs
Artist Performing Work Verdell Primeaux & Johnny Mike
GRAMMY Winner Douglas Spotted Eagle & Tom Bee,producers. Douglas Spotted Eagle,engineer/mixer.
Genre Folk
GRAMMY Category Best Native American Music Album
Year 2000 - 43rd Annual GRAMMY Awards
Title of the Work Gathering Of Nations Pow Wow (Album)
Artist Performing Work (Various Artists)
SOUTHERN COUNTRY BLUEGRASS GOSPEL gives you:
GRAMMY Winner Bill & Gloria Gaither And The Homecoming Friends,artist. Chad Evans,engineer. Bill Gaither,producer.
Genre Gospel
GRAMMY Category Best Southern, Country, or Bluegrass Gospel Album
Year 2001 - 44th Annual GRAMMY Awards
Title of the Work Bill & Gloria Gaither Present A Billy Graham Music Homecoming
Artist Performing Work Bill & Gloria Gaither And The Homecoming Friends
GRAMMY Winner Ricky Skaggs And Kentucky Thunder (Paul Brewster, Luke Bulla, Mark Fain, Clay Hess, Bobby Hicks, Ricky Skaggs, Darrin Vincent),artist. Alan Shulman & Brent King,engineers. Ricky Skaggs,producer.
Genre Gospel
GRAMMY Category Best Southern, Country, or Bluegrass Gospel Album
Year 2000 - 43rd Annual GRAMMY Awards
Title of the Work Soldier Of The Cross (Album)
Artist Performing Work Ricky Skaggs And Kentucky Thunder
GRAMMY Winner Bill Gaither & Gloria Gaither,artists.
Genre Gospel
GRAMMY Category Best Southern, Country, Or Bluegrass Gospel Album
Year 1999 - 42nd Annual GRAMMY Awards
Title of the Work Kennedy Center Homecoming (Album)
Artist Performing Work Bill And Gloria Gaither And Their Homecoming Friends
GRAMMY Winner John Huie, Ken Levitan & Peter Afterman,producers.
Genre Gospel
GRAMMY Category Best Southern, Country, Or Bluegrass Gospel Album
Year 1998 - 41st Annual GRAMMY Awards
Title of the Work The Apostle - Music From And Inspired By The Motion Picture (Album)
Artist Performing Work (Various Artists)
GRAMMY Winner David Corlew & Peter York,compilation producers.
Genre Gospel
GRAMMY Category Best Southern, Country Or Bluegrass Gospel Album
Year 1997 - 40th Annual GRAMMY Awards
Title of the Work Amazing Grace 2: A Country Salute To Gospel (Album)
Artist Performing Work (Various Artists)
GRAMMY Winner Andy Griffith,artist.
Genre Gospel
GRAMMY Category Best Southern Gospel, Country Gospel Or Bluegrass Gospel Album
Year 1996 - 39th Annual GRAMMY Awards
Title of the Work I Love To Tell The Story - 25 Timeless Hymns (Album)
Artist Performing Work Andy Griffith
GRAMMY Winner Bill Hearn,compilation producer.
Genre Gospel
GRAMMY Category Best Southern Gospel, Country Gospel Or Bluegrass Gospel Album
Year 1995 - 38th Annual GRAMMY Awards
Title of the Work Amazing Grace - A Country Salute To Gospel (Album)
Artist Performing Work (Various Artists)
GRAMMY Winner Alison Krauss & Cox Family (Evelyn Cox, Lynn Cox, Sidney Cox, Suzanne Cox, Willard Cox),artists.
Genre Gospel
GRAMMY Category Best Southern Gospel, Country Gospel Or Bluegrass Gospel Album
Year 1994 - 37th Annual GRAMMY Awards
Title of the Work I Know Who Holds Tomorrow (Album)
Artist Performing Work Alison Krauss, The Cox Family
GRAMMY Winner Kathy Mattea,artist.
Genre Gospel
GRAMMY Category Best Southern Gospel, Country Gospel Or Bluegrass Gospel Album
Year 1993 - 36th Annual GRAMMY Awards
Title of the Work Good News (Album)
Artist Performing Work Kathy Mattea
GRAMMY Winner Bruce Carroll,artist.
Genre Gospel
GRAMMY Category Best Southern Gospel Album
Year 1992 - 35th Annual GRAMMY Awards
Title of the Work Sometimes Miracles Hide (Album)
Artist Performing Work Bruce Carroll
GRAMMY Winner Gaither Vocal Band (Bill Gaither),artist.
Genre Gospel
GRAMMY Category Best Southern Gospel Album
Year 1991 - 34th Annual GRAMMY Awards
Title of the Work Homecoming (Album)
Artist Performing Work The Gaither Vocal Band
GRAMMY Winner Bruce Carroll,artist.
Genre Gospel
GRAMMY Category Best Southern Gospel Album
Year 1990 - 33rd Annual GRAMMY Awards
Title of the Work The Great Exchange (Album)
Artist Performing Work Bruce Carroll