- Freeplay
 - Organisation dedicated to establishing off-leash areas for dogs in the Los Angeles area. Includes a map with dog park web sites across the United States. - South Bay Dog Parks
- Promoting dog parks in the South San Francisco Bay area.
- Serve Our Dog Areas (SODA)
- Nonprofit organisation formed to provide ongoing support and stewardship for the Off-Leash dog exercising area at Marymoor Park.
- Citizen Canine
- Dog-activist network seeking fair, unharassed access to Victoria-area public parks for licensed leashed and unleashed dogs and their owners.
- Fellowship In Dog Ownership (FIDO)
- Dedicated to parks and off-leash sites for dogs in Mecklenburg County.
- CalDOG
- Statewide group of off-leash advocates who want to help people throughout California create and preserve off-leash space.
- Main Line Canine
- Dedicated to the establishment, maintenance, support, and preservation of off-leash dog parks throughout the Philadelphia Main Line.
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