- Aggie Feral Cat Alliance of Texas (AFCAT)
 - Dedicated to the welfare, study, and management of feral cat populations on the campus of Texas A&M University. - Alley Cat Allies
- Promotes compassion and humane care for America's feral cat population and advocates a trap-neuter-release program.
- Alley Cat Rescue
- Private, nonprofit cat and kitten resuce organization. Focuses on the feral and stray cats of the Tri-City area.
- Austin Feral Cats
- Information about the trap, neuter, and return (TNR) system to reduce the feral cat population in Austin.
- Aylesbury Cat Rescue
- Volunteer organisation dedicated to finding good homes for domestic and feral cats.
- Campus Cat Coalition - University of Texas, Austin
- Trap/neuter/release program to manage and control the feral cat population.
- Caring For Cats
- Cat sanctuaries set up to rescue and rehome feral cats in the U.K.
- Cat Action Trust 1977
- Helps feral cats in the U.K. by limiting their numbers through neutering and returning to site, and by finding homes for kittens and tame stray cats.
- Cat Rescue of Maryland (CROM)
- Working with feral cat colonies that have committed caretakers, altering and releasing the adults, and taming and placing the kittens.
- CSM Stray Foundation
- Nonprofit feral cat protection group that originated in the Kew Gardens area of Queens.
- Feline Cat Rescue
- Voluntary charity rescuing abandoned, unwanted, abused, and feral cats and kittens.
- Feral Cat Coalition
- Information related to spay, neuter, release programs for feral cats. Also general info of interest to those dealing with cats.
- Feral Cat Coalition of Oregon
- Dedicated to the humane reduction of feral cat populations through spaying and neutering clinics.
- Feral Cat Foundation
- Adoption of tame cats and kittens to loving homes, and trap-neuter-release program to manage and control the feral cat population.
- Feral Friends
- Animal rescue group offering dog and cat adoptions and humane feral cat management.
- For the Love of Cats
- Sponsors no-kill programs for domestic and feral cats.
- Forgotten Felines of Sonoma County@
- Hawaii Cat Foundation
- Nonprofit organization using TNR to humanely reduce the feral cat population in Hawaii.
- Keepers of the Colony
- Nonprofit trap-neuter-return organization for feral cats in the Buffalo, Missouri, area.
- Kittico Cat Rescue
- Nonprofit organization dedicated to helping stray and feral cats.
- Kitty Angels
- A no-kill cat shelter serving Eastern Massachusetts and Southern New Hampshire, specializing in rescuing feral cats.
- Knoxville Feral Cat Friends
- A project of Peaceful Kingdom. An ever-growing group works on a volunteer basis to feed, water, and TNR hundreds of feral cats in the Knoxville area.
- Meower Power Feral Cat Coalition
- Nonprofit organization dedicated to the care and management of feral cats in Hampton Roads, Virginia communities.
- Metro Ferals, Inc.
- All-volunteer organization in metro Washington, DC running a low-cost spay, neuter clinic for feral cats. Trapping assistance.
- Neighborhood Cats
- Formed in 1999 to promote trap-neuter-return as the most humane and effective means of solving New York City's severe feral cat overpopulation crisis.
- New York City Feral Cat Council (NYCFCC)
- Coalition of NYC animal organizations working to humanely and effectively reduce the city's feral cat population through the use of trap-neuter-return.
- Oasis De Los Gatos
- Located in Arizona, they are dedicated to maintaining a sanctuary for feral cats, and educating humans about the feral cat.
- Prince Georges Feral Friends
- Feral cat rescue with a holistic approach to health care.
- Rehab-A-Cat
- Implementing a program of feral trap, neuter, and release in the Greater New Haven, Connecticut area.
- Safe Haven for Cats
- Instructions for raising feral kittens, and trapping and socialing feral cats.
- Safe Haven For Cats - Raleigh, NC
- Nonprofit, no-kill cat shelter.
- Silicon Valley Friends of Ferals
- Helps feral cats by implementing trap-test-vaccinate-alter-release programs in the South San Francisco Bay Area.
- Urban Cat League
- Provides care and protection to New York City's street cats. Activities include: adoption, spay/neuter, socialization of kittens and adults, and relocation.
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