Organizers
- Medford Parks and Recreation
- Medford Ugly Sweater 5K
- Media That Matters
- Medic Booster Club
- Medical Training of the Palm Beaches
- Medina Fastpitch
- Medinah Park District
- MEDLIFE at UGA
- Meek Basketball Camps
- Meet The Monster Athletics
- Meeting Professionals International
- Megan McClung Memorial Run
- Megan's Mission
- Meghan McCarthy 5K Road Race
- Meigs County Youth Football League
- Meitheal Mara
- Melanie Van Delden
- Melanoma Research Foundation
- Melbourne Institute of Baseball
- Melbourne Institute of Baseball (MIB)
- Melissa Kelly Dance Academy
- Melissa Kutcher Gymnastics Camp LLC
- Melissa Ridge PTSO / Melissa Ridge Race
- Mellew Productions
- Melrose YMCA
- Memorial Fund for Eva Gallagher
- Memorial Medical Center
- Memorial Medical Center Foundation
- Memorial Presbyterian Church
- Memories of Missing Smiles, Inc. (M.O.M.S.)
- Memory Lane Farm
- Memphis Goalkeeper Academy
- Memphis Soccer Camps
- Memphis Tennis Association
- Memphis University School
- Memphis Zoo
- Men of Christ
- Mena Swim Team
- Mended Little Hearts of Volusia County
- Mendocino Coast Police Activities League
- Mendocino Coast Recreation and Park District
- Mendon-Upton Education Foundation
- Mendon-Upton Regional Teachers Association
- Menifee Lakes Country Club
- Menlo-Atherton Pop Warner
- Menomonee Falls High School Student Council
- Menomonie Parks and Recreation Department
- Men's Health Forum Scotland
- Mentally Fit
- Mentoring Youth Nantucket, Inc
