Organizers
- Middle Tennessee State University
- Middleburgh Library Association
- Middlebury Aquatic Club
- Middlebury Area Land Trust
- Middlebury Interactive Languages
- Middlebury Racquet Club
- Middlesex Platform Tennis
- Middlesex Tennis
- Middlesex Youth Camp
- Middleton Elementary PTO
- Middleton Middle school courts
- Middleton Recreation Division
- Middleton United Soccer Club
- Middleton Yahara Soccer Club
- Middletown Tennis Association
- Middletown Youth PWF
- Midlakes ASA Softball
- Midland Athletic Co. Timing & Events
- Midland Athletic Company
- Midland Community Tennis Center
- Midland COmmunity Theatre
- Midland Community Theatre
- Midland County Greater Works
- Midland Heights Baptist Church
- Midland Jaycees
- Midland Junior Team Tennis
- Midland Northeast Little League
- Midland Rockhounds
- Midland Tomahawks
- Midland United Girls Softball
- Midland University
- Midlothian Athletic Club
- Midlothian Middle School Tennis
- Midlothian Tennis Association
- MIDLOTHIAN TENNIS ASSOCIATION
- Midlothian Tennis Club
- Mid-Maine Regional Adult Community Education
- Mid-Michigan Multisport Racing Club
- Midnight Basketball Program, Nashville
- Midnight Sun Lazyman Triathlon
- Midnite Racing & Timing
- Mid-Prairie (Kalona) Nitro
- Mid-South Illinois Tennis Association
- MidSouth Music Institute, Inc.
- MIDSummer at Maryland International Day School
- MidSummer Nights Madness Girls Basketball Tournaments
- MidTnMultisport
- Midtown Athletic Club
- Midtown Athletic Club- Bannockburn
- Midtown Athletic Club- Chicago
