Here is a preliminary List of Music Festivals that are scheduled in the United States during 2009. If you know of any festival that is not listed here, please feel free to comment and I will add it to the list.

A better, managed by date listing is available at:
The 2009 Music Festival Guide


2009 Music Festival List
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* 10,000 Lakes Music Festival
* All Good Music Festival
* All Points West Music & Arts Festival
* ATP New York
* Austin City Limits Music Festival
* Bang! Music Festival
* Beale Street Music Festival
* Bear Creek Music & Arts Festival
* Bonnaroo Music and Arts Festival
* Bumbershoot
* Capital Hill Block Party
* City Stages
* CMJ Music Marathon
* Coachella Valley Music and Arts Festival
* Cracker and Camper Van Beethoven Campout
* Detroit Electronic Music Festival
* DFest
* Eagle Rock Music Festival
* Electric Daisy Carnival
* Fabulous Festival
* Farm Aid
* Festival in the Forest
* Forecastle Festival
* Forward Music Festival
* Fuck Yeah Fest
* Fun Fun Fun Fest
* Gaian Mind Summer Music Festival
* Gathering of The Vibes
* Grand Targhee Bluegrass Festival
* HARD 13
* HARD Haunted Mansion
* HARD Summer Festival
* Hardly Strictly Bluegrass
* Harmony Festival
* Harvest Fest
* NY Harvest Festival & Freedom Fair
* Harvest of Hope Fest
* Hideout Chicago Block Party
* High Sierra Music Festival
* I Am Festival
* Jackson Hole Music Festival
* Jam on the River Festival
* Joshua Tree Music Festival
* Langerado Music Festival
* Loki Music Festival
* Lollapalooza
* Magnolia Fest
* MidPoint Music Festival
* Mile High Music Festival
* Mission Creek Festival
* Monolith Music Festival
* Monterey Music Summit
* Mountain Jam Festival
* Mulberry Mountain Harvest Music Festival
* Musicfest NW
* Neil Young’s Bridge School Benefit
* New Orleans Jazz and Heritage Festival
* Newport Folk Festival
* No Fun Fest
* Nocturnal Festival
* Noise Pop
* North American Music Union
* Northgate Music Festival
* OC Music Fest
* Outside Lands Festival
* Pitchfork Music Festival
* Popped! Philadelphia Music Festival
* Project Earth
* Pygmalion Music Festival
* Rites of Spring Music Festival
* Rock City
* Rock on the Range Music Festival
* Rothbury Music Festival
* Sasquatch! Music Festival
* School of Rock Festival
* Siren Music Festival
* Slow Food Rocks
* Sonic Bloom
* Sounds Like Brooklyn
* Soundset Festival
* South by Southwest
* South Padre International Music Festival
* Stagecoach Music Festival
* Starscape Festival
* Starwood
* Strawberry Music Festivals
* Street Scene
* Strip Mines Music Festival
* Summer Camp Music Festival
* Summerfest
* Sunfest
* Sunset Junction Street Fair
* Sunset Strip Music Festival
* Suwannee Springfest
* Targhee Fest
* Telluride Bluegrass Festival
* Telluride Blues & Brews Festival
* The Bamboozle
* The Blip Festival
* The Echo Project
* The Hoodwink Festival
* Tomorrow Never Knows Festival
* Treasure Island Music Festival
* Tribal Fest Number 9, Number 9
* Tucson Gem & Jam
* Turkey Soup
* Ultra Music Festival
* Up North Festival
* Virgin Mobile Festival
* Voodoo Music Experience
* Warped Tour
* Wakarusa Music and Camping Festival
* Wanee Music Festival
* We The People Festival
* Whartscape Music Festival
* Winter Music Conference