| Wind Vineyards Bluegrass Festival | Tappahannock | VA | United States | September | Bluegrass |
| Ozark Folk Festival | Mountain View | AR | United States | September | Folk music, with elements of Americana, singer-songwriter, and roots music |
| Love RNB Festival | Los Angeles | CA | United States | September | R&B |
| Plumas Homegrown Americana Festival | Quincy | CA | United States | September | Americana |
| Four Corners Folk Festival | Pagosa Springs | CO | United States | September | Bluegrass |
| Twin Oaks Spring Bluegrass Festival | Hoboken | GA | United States | September | Bluegrass |
| Farmington’s Weekend Bluegrass Festival Jam | Farmington | IA | United States | September | Bluegrass |
| Roots & Rhythm Festival | Morris | IL | United States | September | Americana and Roots, blues, folk |
| Metamora Music Festival | Metamora | IN | United States | September | Variety |
| Wheatland Music Festival | Remus | MI | United States | September | Americana, Bluegrass |
| Antlers and Acorns Boone Songwriter Festival | Boone | NC | United States | September | Singer-Songwriter, Americana, folk, and roots music |
| Mountain Song Festival | Brevard | NC | United States | September | Bluegrass |
| Earl Scruggs Music Festival | Mill Spring | NC | United States | September | Bluegrass |
| JoCo Bluegrass Festival | Selma | NC | United States | September | Bluegrass |
| Big Blues Bender | Las Vegas | NV | United States | September | Blues |
| Oldtone Roots Music Festival | Hillsdale | NY | United States | September | Bluegrass |
| Black Swamp Arts Festival | Bowling Green | OH | United States | September | Variety |
| SamJam Bluegrass Festival | Piketon | OH | United States | September | Bluegrass |
| Bluegrass & Chili Festival | Wagoner | OK | United States | September | Bluegrass |
| Aiken Bluegrass Festival | Aiken | SC | United States | September | Bluegrass |
| Mountain City Fiddlers Convention | Mountain City | TN | United States | September | Old-Time, Bluegrass |
| Grand Master Fiddle Championship | Nashville | TN | United States | September | Bluegrass |
| Nelson McGee Memorial Bluegrass Festival | San Angelo | TX | United States | September | Bluegrass |
| Watermelon Pickers’ Fest | Berryville | VA | United States | September | Bluegrass |
| Rockbridge Mountain Music Dance Festival | Buena Vista | VA | United States | September | Bluegrass |
| North Cascades Bluegrass Festival | Bellingham | WA | United States | September | Bluegrass |
| Jackpine Jamboree | Birnamwood | WI | United States | September | Bluegrass |
| Cameron Bluegrass Festival | Cameron | WI | United States | September | Bluegrass |
| Yellowstone Songwriter Festival | Cody | WY | United States | September | Singer-Songwriting, Americana, Bluegrass, Country, Folk, Indie, Rock |
| Pickin’ in the Pines Bluegrass & Acoustic Music Festival | Flagstaff | AZ | United States | September | Bluegrass and Acoustic Music, with potential inclusion of Americana and roots music. |
| Telluride Blues and Brews | Telluride | CO | United States | September | Bluegrass, Blues, Folk |
| Weedstock | Townsend | DE | United States | September | Variety |
| Art of the Que | Spencer | IA | United States | September | Variety, Country, Rock, Blues |
| Jerusalem Ridge Bluegrass Celebration | Rosine | KY | United States | September | Bluegrass |
| Louisiana Folk Roots Festival | Natchitoches | LA | United States | September | Folk, Americana, Roots, with a focus on Louisiana music traditions. |
| Brooklyn Americana Music Festival | Northampton | MA | United States | September | Americana music, including folk, roots, country, bluegrass, and related genres |
| Annapolis Songwriters Festival | Annapolis | MD | United States | September | Singer-Songwriter, Americana, Bluegrass, Country, Folk, Indie, Rock |
| Hollywood Rescue Squad Bluegrass Festival | Leonardtown | MD | United States | September | Bluegrass |
| Music at The Intersection | St. Louis | MO | United States | September | Blues, Hip Hop, Jazz, R&B, Rock, Soul |
| Old Time Music Ozark Heritage Festival | West Plains | MO | United States | September | Bluegrass |
| Mighty Roots Music Festival | Stovall | MS | United States | September | Americana, with strong roots in Blues, Folk, Rock, and Country, featuring singer-songwriter artists. |
| Pickin’ on the Pungo Bluegrass Festival | Belhaven | NC | United States | September | Bluegrass |
| Carolina Bible Camp Bluegrass Festival | Mocksville | NC | United States | September | Bluegrass |
| Hoppin’ John Old-Time & Bluegrass Fiddler’s Convention | Pittsboro | NC | United States | September | Bluegrass |
| Bender Jamboree | Las Vegas | NV | United States | September | Bluegrass |
| Brooklyn Americana Music Festival | Brooklyn | NY | United States | September | Americana, featuring singer-songwriter artists, with influences of folk, roots, and blues. Held across multiple venues in Brooklyn, offering a diverse lineup. |
| Borderland Festival | East Aurora | NY | United States | September | Folk, Jam |
| Bluegrass in Heaven | Silver Bay | NY | United States | September | Bluegrass |
| Born & Raised Festival | Pyror | OK | United States | September | Country |
| Grits ‘n Grass Music Festival | Pickens | SC | United States | September | Bluegrass |
| Bristol Rhythm and Roots | Bristol | TN | United States | September | Bluegrass, Blues, Folk |
| Bristol Rhythm & Roots Reunion | Bristol | TN | United States | September | Old-Time, Bluegrass |
| Cherokee Music Fest | Cherokee | VA | United States | September | Bluegrass |
| Damascus Old Mill Music Fest | Damascus | VA | United States | September | Bluegrass |
| Geroge, WA Bluegrass Festival | George | WA | United States | September | Bluegrass |
| East Troy Bluegrass Festival | East Troy | WI | United States | September | Bluegrass |
| Del Rio Beans & Bluegrass | Del Rio | TN | United States | September | Bluegrass |
| Payson Fiddle & Food Truck Festival | Payson | AZ | United States | September | Bluegrass |
| Berkeley Old Time Music Convention | Berkeley | CA | United States | September | Bluegrass |
| Coastal Country Jam | Long Beach | CA | United States | September | Country |
| Camp Deep End | Navarro | CA | United States | September | Jam |
| Holo Holo California | Sacramento | CA | United States | September | Reggae |
| American Roots Music Festival | Guilford | CT | United States | September | American roots music, including folk, bluegrass, blues, and Americana |
| Island Hopper Songwriting Festival | Fort Meyers | FL | United States | September | Singer-Songwriting |
| Dailey & Vincent’s American Made Music Fest | Hiawassee | GA | United States | September | Country, Bluegrass, Gospel |
| Riot Fest Chicago | Chicago | IL | United States | September | Alternative, EMO, Hip Hop, Metal, Punk, Rock |
| Bean Blossom Bluegrass & Uncle Pen Festival | Morgantown | IN | United States | September | Bluegrass |
| Bourbon & Beyond | Louisville | KY | United States | September | Bluegrass, Folk, Rock |
| Poppy Mountain Music Festival | Morehead | KY | United States | September | Bluegrass |
| Blazin’ Bluegrass Festival | Whitley City | KY | United States | September | Bluegrass |
| FreshGrass Music Festival | North Adams | MA | United States | September | Bluegrass, Americana, roots music with a focus on emerging artists and contemporary sounds within these genres. |
| Berlin Fiddlers Convention | Berlin | MD | United States | September | Bluegrass |
| Upperco Music Festival | Upperco | MD | United States | September | Bluegrass |
| Bend of the River | Mankato | MN | United States | September | Country |
| Boats and Bluegrass | Winona | MN | United States | September | Bluegrass |
| Starvy Creek Bluegrass Festival | Conway | MO | United States | September | Bluegrass |
| Mississippi Songwriting Festival – Gulf Coast Edition | Ocean Springs & Gautier | MS | United States | September | Variety |
| Miles City Bluegrass Festival | Miles City | MT | United States | September | Bluegrass |
| IBMA World of Bluegrass | Raleigh | NC | United States | September | Bluegrass |
| XPoNential Festival | Camden | NJ | United States | September | Alternative, Indie, Rock |
| IHeartRadio Festival | Las Vegas | NV | United States | September | Variety |
| Woodsist Festival | Accord | NY | United States | September | Folk, Indie |
| Lost Lands | Legend Valley | OH | United States | September | Bass, Electronic |
| Van Wert Country Bluegrass Festival | Van Wert | OH | United States | September | Bluegrass |
| SkinnyFest Bluegrass Festival | West Union | OH | United States | September | Bluegrass |
| Cascade Equinox Festival | Redmond | OR | United States | September | Bluegrass, Electronic, Jam, Soul |
| Tygh Valley Bluegrass Jamboree | Typh Valley | OR | United States | September | Bluegrass |
| Dumplin Valley Bluegrass Festival | Kodak | TN | United States | September | Bluegrass |
| AmericanaFest | Nashville | TN | United States | September | Americana, roots, singer-songwriter, with a wide range of subgenres and artists |
| Pigeon Forge Bluegrass Festival | Pigeon Forge | TN | United States | September | Bluegrass |
| Richmond East Moose Lodge Apple, Cider, Bluegrass Festival | Ashland | VA | United States | September | Bluegrass |
| Nothin’ Fancy Bluegrass Festival | Buena Vista | VA | United States | September | Bluegrass |
| The Infamous Weekend | Martinsville | VA | United States | September | Bluegrass, Jam |
| Iron Blossom | Richmond | VA | United States | September | Indie, Rock |
| Lake Martin Songwriter Festival | Alexander City | AL | United States | September | Singer-Songwriter, Americana, Folk and Country |
| South Star | Huntsville | AL | United States | September | Alternative, Hip Hop, Pop, Rock |
| Boots in the Park Tempe Fall | Tempe | AZ | United States | September | Country |
| Ohana Festival | Dana Point | CA | United States | September | Alternative, Country, Folk, Indie, Rock |
| Monterey Jazz Festival | Monterey | CA | United States | September | Jazz |
| Soundside Festival | Bridgeport | CT | United States | September | Folk, Pop, Rock |
| St. Augustine Songwriters Festival | St. Augustine | FL | United States | September | Singer-Songwriting |
| Georgia State Bluegrass Festival | Folkston | GA | United States | September | Bluegrass |
| First City Music Festival | Vincennes | IN | United States | September | Americana, Jam |
| Vine Grove Bluegrass Festival | Vine Grove | KY | United States | September | Bluegrass |
| All Things Go Festival | Columbia | MD | United States | September | Indie, Pop, Rock |
| Oceans Calling Festival | Ocean City | MD | United States | September | Indie, Pop, Rock |
| George Portz Traditional Music Festival | Festus | MO | United States | September | Bluegrass |
| Evolution Festival | St. Louis, | MO | United States | September | Alternative, Hip Hop, Rock |
| HOBA’s Fall Bluegrass Festival | West Plains | MO | United States | September | Bluegrass |
| A Big Beautiful Block Party | Las Vegas | NV | United States | September | Pop |
| Global Citizen Festival | New York City | NY | United States | September | Pop, Rock |
| Sisters Folk Festival | Sisters | OR | United States | September | Folk |
| Pilgrimage Music Festival | Franklin | TN | United States | September | Bluegrass, Folk, Indie, Rock |
| Mempho Fest | Memphis | TN | United States | September | Blues, Indie, Rock |
| American Mule and Music Festival | Shelbyville | TN | United States | September | Bluegrass |
| Townsend Fall Heritage Festival | Townsend | TN | United States | September | Bluegrass |
| 903 Sun Sets IV | Paris | TX | United States | September | Country |
| Mountain Heritage Arts & Crafts Festival | Kearneysville | WV | United States | September | Bluegrass |
| Annapolis Baygrass Music Festival | Annapolis | MD | United States | September | Americana, Bluegrass and Jamgrass |
| North Coast Music Festival | Chicago | IL | United States | September | Alternative, Electronic, Hip Hop, Indie, Rock |
| Shoe Fest | Manteno | IL | United States | September | Variety |
| Walnut Valley Festival | Winfield | KS | United States | September | Bluegrass, Americana, roots, with a diverse lineup of artists across various genres |
| Thomas Point Beach BG Festival | Brunswick | ME | United States | September | Bluegrass |
| County Bluegrass Labor Day Festival | Fort Fairfield | ME | United States | September | Bluegrass |
| Detroit Jazz Festival | Detroit | MI | United States | September | Jazz |
| Delaware Valley Bluegrass Festival | Woodstown | NJ | United States | September | Bluegrass |
| John Coltrane Jazz & Blues Fest | High Point | NY | United States | September | Blues, Jazz, Latin |
| Karnival of the Arts | Kempton | PA | United States | September | Variety |
| Rhythm and Roots | Charlestown | RI | United States | September | Americana, Bluegrass, Folk |
| FarmJam Music Festival | Colville | WA | United States | September | Bluegrass, Country, Rock |
| Bumbershoot | Seattle | WA | United States | September | Alternative, Electronic, Hip Hop, Indie, Rock |
| Mountain Stage New Song Festival Charleston | Charleston | WV | United States | September | Singer-Songwriter, with strong representation of Americana, folk, and roots music, featuring a mix of established and emerging artists. |
| Horseshoe Music Festival | Jackson | WY | United States | September | Americana |
| Moon River Festival | Chattanooga | TN | United States | September | Folk, with strong representation of Americana, singer-songwriter, and roots music. This festival offers a more intimate setting focused on these genres. |
| Pickin’ in the Rockies | Loma | CO | United States | September | Bluegrass |
| Dandridge Music on the Town | Dandridge | TN | United States | September | Bluegrass |
