| Wind Vineyards Bluegrass Festival | Tappahannock | VA | United States | September | 1 Day | 1st Saturday | Bluegrass |
| Antlers and Acorns Boone Songwriter Festival | Boone | NC | United States | September | 4 Days | 1st Weekend | Singer-songwriter, Americana, folk, and roots music |
| Appaloosa Music Festival | Front Royal | VA | United States | September | 2 Days | 1st Weekend | Bluegrass |
| Blueberry Bluegrass Festival | Stony Plain | AB | Canada | September | 3 Days | 1st Weekend | Bluegrass |
| Bluegrass & Chili Festival | Wagoner | OK | United States | September | 2 Days | 1st Weekend | Bluegrass |
| Cameron Bluegrass Festival | Cameron | WI | United States | September | 3 Days | 1st Weekend | Bluegrass |
| Camp Springs Bluegrass Festival | Elon | NC | United States | September | 2 Days | 1st Weekend | Bluegrass |
| Coombs Bluegrass Bluegrass Festival | Coombs | BC | Canada | September | 3 Days | 1st Weekend | Bluegrass |
| Delaware Valley Bluegrass Festival | Woodstown | NJ | United States | September | 2 Days | 1st Weekend | Bluegrass |
| Earl Scruggs Music Festival | Mill Spring | NC | United States | September | 2 Days | 1st Weekend | Bluegrass |
| Farmington’s Weekend Bluegrass Festival Jam | Farmington | IA | United States | September | 2 Days | 1st Weekend | Bluegrass |
| Four Corners Folk Festival | Pagosa Springs | CO | United States | September | 2 Days | 1st Weekend | Bluegrass |
| Grand Master Fiddle Championship | Nashville | TN | United States | September | 2 Days | 1st Weekend | Bluegrass |
| Jackpine Jamboree | Birnamwood | WI | United States | September | 4 Days | 1st Weekend | Bluegrass |
| Jerusalem Ridge Bluegrass Celebration | Rosine | KY | United States | September | 4 Days | 1st Weekend | Bluegrass |
| Metamora Music Festival | Metamora | IN | United States | September | 2 Days | 1st Weekend | |
| Mountain City Fiddlers Convention | Mountain City | TN | United States | September | 1 Day | 1st Weekend | Oldtime |
| Mountain Song Festival | Brevard | NC | United States | September | 2 Days | 1st Weekend | Bluegrass |
| North Cascades Bluegrass Festival | Bellingham | WA | United States | September | 2 Days | 1st Weekend | Bluegrass |
| Pickin’ at the Post | Luray | VA | United States | September | 2 Days | 1st Weekend | Bluegrass |
| Plumas Homegrown Americana Festival | Quincy | CA | United States | September | 2 Days | 1st Weekend | Americana |
| Rockbridge Mountain Music Dance Festival | Buena Vista | VA | United States | September | 2 Days | 1st Weekend | Bluegrass |
| Roots & Rhythm Festival | Morris | IL | United States | September | 3 Days | 1st Weekend | Roots, Americana, blues, folk |
| SamJam Bluegrass Festival | Piketon | OH | United States | September | 5 Days | 1st Weekend | Bluegrass |
| Thomas Point Beach BG Festival | Brunswick | ME | United States | September | 4 Days | 1st Weekend | Bluegrass |
| Twin Oaks Spring Bluegrass Festival | Hoboken | GA | United States | September | 3 Days | 1st Weekend | Bluegrass |
| Watermelon Pickers’ Fest | Berryville | VA | United States | September | 3 Days | 1st Weekend | Bluegrass |
| Yellowstone Songwriter Festival | Cody | WY | United States | September | 3 Days | 1st Weekend | Singer/songwriting |
| Highlands Bluegrass Festival | Sloatsburg | NY | United States | September | 1 Day | 2nd Sunday | Bluegrass |
| Berks Fiddle Fest | Lehigh Valley | PA | United States | September | 1 Day | 2nd Weekend | Bluegrass |
| Bluegrass in Heaven | Silver Bay | NY | United States | September | 3 Days | 2nd Weekend | Bluegrass |
| Boise Folk Festival | Boise | ID | United States | September | 2 Days | 2nd Weekend | Folk, Americana, singer-songwriter, with a focus on various folk music styles |
| Bristol Rhythm & Roots Reunion | Bristol | TN | United States | September | 3 Days | 2nd Weekend | Bluegrass |
| Bristol Rhythm & Roots Reunion | Bristol | TN | United States | September | 3 Days | 2nd Weekend | Bluegrass |
| Brooklyn Americana Music Festival | | NY | United States | September | 4 Days | 2nd Weekend | Primarily Americana, featuring singer-songwriter artists, with influences of folk, roots, and blues. Held across multiple venues in Brooklyn, offering a diverse lineup. |
| Carolina Bible Camp Bluegrass Festival | Mocksville | NC | United States | September | 1 Day | 2nd Weekend | Bluegrass |
| Clare Bluegrass Association Festival | Meteghan Centre | NS | Canada | September | 5 Days | 2nd Weekend | Bluegrass |
| Clatskanie Bluegrass Festival | Clatskanie | OR | United States | September | 3 Days | 2nd Weekend | Bluegrass |
| East Troy Bluegrass Festival | East Troy | WI | United States | September | 2 Days | 2nd Weekend | Bluegrass |
| Geroge, WA Bluegrass Festival | George | WA | United States | September | 7 Days | 2nd Weekend | Bluegrass |
| Grits ‘n Grass Music Festival | Pickens | SC | United States | September | 2 Days | 2nd Weekend | Bluegrass |
| Hoppin’ John Old-Time & Bluegrass Fiddler’s Convention | Pittsboro | NC | United States | September | 3 Days | 2nd Weekend | Bluegrass |
| Jerusalem Ridge Bluegrass Celebration | Rosine | KY | United States | September | 4 Days | 2nd Weekend | Bluegrass |
| Kent American Roots Music Festival | Kent | OH | United States | September | 2 Days | 2nd Weekend | Primarily Americana, with strong representation of folk, roots, and bluegrass influences. Features singer-songwriter artists alongside bands. |
| Lightning Bug Music Festival | Valparaiso | IN | United States | September | 2 Days | 2nd Weekend | Indie, alternative, rock, with a diverse lineup across various genres |
| Mighty Roots Music Festival | Stovall | MS | United States | September | 2 Days | 2nd Weekend | Primarily Americana, with strong roots in Blues, Folk, Rock, and Country, featuring singer-songwriter artists. |
| Mohican Bluegrass Festival | Glenmont | OH | United States | September | 3 Days | 2nd Weekend | Bluegrass |
| Northern Lights Bluegrass & Old Tyme Music Camp and Festival | Big River | SK | Canada | September | 7 Days | 2nd Weekend | Bluegrass |
| Panama Songwriters Festival | Panama City | FL | United States | September | 2 Days | 2nd Weekend | Singer-songwriter, Americana, folk |
| Pickin’ in the Pines Bluegrass & Acoustic Music Festival | Flagstaff | AZ | United States | September | 3 Days | 2nd Weekend | Bluegrass and Acoustic Music, with potential inclusion of Americana and roots music. |
| Roots on the River | Chestertown | MD | United States | September | 3 Days | 2nd Weekend | Americana, Roots, Blues, Folk, with influences of Rock and Country. |
| Walnut Valley Festival | Winfield | KS | United States | September | 4 Days | 2nd Weekend | Bluegrass, Americana, roots, with a diverse lineup of artists across various genres |
| White Fish Songwriting Festival | Whitefish | MT | United States | September | 3 Days | 2nd Weekend | Singer-songwriter, Americana, folk, and roots music |
| Del Rio Beans & Bluegrass | Del Rio | TN | United States | September | 1 Day | 3rd Saturday | Bluegrass |
| American Roots Music Festival | Guilford | CT | United States | September | 4 Days | 3rd Weekend | American roots music, including folk, bluegrass, blues, and Americana |
| AmericanaFest | Nashville | TN | United States | September | 5 Days | 3rd Weekend | Americana, roots, singer-songwriter, with a wide range of subgenres and artists |
| Bean Blossom Bluegrass & Uncle Pen Festival | Morgantown | IN | United States | September | 4 Days | 3rd Weekend | Bluegrass |
| Berkeley Old Time Music Convention | Berkeley | CA | United States | September | 5 Days | 3rd Weekend | Bluegrass |
| Berlin Fiddlers Converntion | Berlin | MD | United States | September | 3 Days | 3rd Weekend | Bluegrass |
| Blazin’ Bluegrass Festival | Whitley City | KY | United States | September | 3 Days | 3rd Weekend | Bluegrass |
| Boats and Bluegrass | Winona | MN | United States | September | 4 Days | 3rd Weekend | Bluegrass |
| Carolina In The Fall Music & Food Festival | Wilkesboro | NC | United States | September | 2 Days | 3rd Weekend | Bluegrass |
| Cumberland River Bluegrass Festival | Burkesville | KY | United States | September | 3 Days | 3rd Weekend | Bluegrass |
| Dailey & Vincent’s American Made Music Fest | Hiawassee | GA | United States | September | 3 Days | 3rd Weekend | Country, Bluegrass, Gospel |
| Dumplin Valley Bluegrass Festival | Kodak | TN | United States | September | 3 Days | 3rd Weekend | Bluegrass |
| FreshGrass Music Festival | North Adams | MA | United States | September | 3 Days | 3rd Weekend | Bluegrass, Americana, roots music with a focus on emerging artists and contemporary sounds within these genres. |
| IBMA World of Bluegrass | Raleigh | NC | United States | September | 5 Days | 3rd Weekend | Bluegrass |
| Island Hopper Songwriting Festival | Fort Meyers | FL | United States | September | 10 Days | 3rd Weekend | Singer/songwriting |
| Miles City Bluegrass Festival | Miles City | MT | United States | September | 3 Days | 3rd Weekend | Bluegrass |
| Nothin’ Fancy Bluegrass Festival | Buena Vista | VA | United States | September | 3 Days | 3rd Weekend | Bluegrass |
| Payson Fiddle & Food Truck Festival | Payson | AZ | United States | September | 2 Days | 3rd Weekend | Bluegrass |
| Pigeon Forge Bluegrass Festival | Pigeon Forge | TN | United States | September | 2 Days | 3rd Weekend | Bluegrass |
| Poppy Mountain Music Festival | Morehead | KY | United States | September | 5 Days | 3rd Weekend | Bluegrass |
| Richmond East Moose Lodge Apple, Cider, Bluegrass Festival | Ashland | VA | United States | September | 2 Days | 3rd Weekend | Bluegrass |
| SkinnyFest Bluegrass Festival | West Union | OH | United States | September | 3 Days | 3rd Weekend | Bluegrass |
| Starvy Creek Bluegrass Festival | Conway | MO | United States | September | 3 Days | 3rd Weekend | Bluegrass |
| The Infamous Weekend | Martinsville | VA | United States | September | 2 Days | 3rd Weekend | Bluegrass |
| Two Rivers Bluegrass Festival | Durand | IL | United States | September | 3 Days | 3rd Weekend | Bluegrass |
| Tygh Valley Bluegrass Jamboree | Typh Valley | OR | United States | September | 3 Days | 3rd Weekend | Bluegrass |
| Upperco Music Festival | Upperco | MD | United States | September | 5 Days | 3rd Weekend | Bluegrass |
| Van Wert Country Bluegrass Festival | Van Wert | OH | United States | September | 3 Days | 3rd Weekend | Bluegrass |
| Lone Cedar Acres Bluegrass Festival | Pittsville | MD | United States | September | 1 Day | 4th Saturday | Bluegrass |
| American Mule and Music Festival | Shelbyville | TN | United States | September | 3 Days | 4th Weekend | Bluegrass |
| Carl Junction Bluegrass Festival | Carl Junction | MO | United States | September | 1 Day | 4th Weekend | Bluegrass |
| First City Music Festival | Vincennes | IN | United States | September | 4 Days | 4th Weekend | Bluegrass |
| George Portz Traditional Music Festival | Festus | MO | United States | September | 2 Days | 4th Weekend | Bluegrass |
| Georgia State Bluegrass Festival | Folkston | GA | United States | September | 4 Days | 4th Weekend | Bluegrass |
| HOBA’s Fall Bluegrass Festival | West Plains | MO | United States | September | 3 Days | 4th Weekend | Bluegrass |
| Lake Martin Songwriter Festival | Alexander City | AL | United States | September | 4 Days | 4th Weekend | Singer-songwriter, Americana, folk, and country |
| Mountain Heritage Arts & Crafts Festival | Kearneysville | WV | United States | September | 2 Days | 4th Weekend | Bluegrass |
| Rogersville Bluegrass Festival | Rogersville | NB | Canada | September | 3 Days | 4th Weekend | Bluegrass |
| Sisters Folk Festival | Sisters | OR | United States | September | 3 Days | 4th Weekend | Folk |
| St. Augustine Songwriters Festival | St. Augustine | FL | United States | September | 3 Days | 4th Weekend | Singer/songwriting |
| Townsend Fall Heritage Festival | Townsend | TN | United States | September | 2 Days | 4th Weekend | Bluegrass |
| Vine Grove Bluegrass Festival | Vine Grove | KY | United States | September | 3 Days | 4th Weekend | Bluegrass |
| Annapolis Baygrass Music Festival | Annapolis | MD | United States | September | 2 Days | Fall Equinox | Progressive bluegrass, jamgrass, and Americana |
| Blissfest Music Festival | Harbor Springs | MI | United States | September | 4 Days | Labor Day Weekend | Diverse mix, including Americana, Folk, Roots, Bluegrass, Singer-Songwriter, and World Music. |
| County Bluegrass Labor Day Festival | Fort Fairfield | ME | United States | September | 4 Days | Labor Day Weekend | Bluegrass |
| Mountain Stage New Song Festival Charleston | Charleston | WV | United States | September | 3 Days | Labor Day Weekend | Primarily singer-songwriter, with strong representation of Americana, folk, and roots music, featuring a mix of established and emerging artists. |
| Tri-State Bluegrass Music Festival | Kendallville | IN | United States | September | 4 Days | Labor Day Weekend | Bluegrass |
| Moon River Festival | Chattanooga | TN | United States | September | 3 Days | Last Weekend | Primarily folk, with strong representation of Americana, singer-songwriter, and roots music. This festival offers a more intimate setting focused on these genres. |
| Dandridge Music on the Town | Dandridge | TN | United States | September | 1 Day | Thursdays | Bluegrass |
