| Macomb County Humane Society | (Utica, MI) |
| Marine Mammal Center | (Sausalito, CA) |
| MaxFund Animal Adoption Center | (Denver, CO) |
| Memphis Zoo | (Memphis, TN) |
| Michigan Anti-Cruelty Society | (Detroit, MI) |
| Michigan Humane Society | (Bingham Farms, MI) |
| Minnesota Zoo Foundation | (Apple Valley, MN) |
| Monadnock Humane Society | (Swanzey, NH) |
| Monmouth County SPCA | (Eatontown, NJ) |
| Montana Wildlife Federation | (Helena, MT) |
| Monterey Bay Aquarium | (Monterey, CA) |
| Montgomery County SPCA | (Conshohocken, PA) |
| Morris Animal Foundation | (Denver, CO) |
| Mountain Lion Foundation | (Sacramento, CA) |
| MSPCA-Angell | (Boston, MA) |
| Nashville Humane Association | (Nashville, TN) |
| Nashville Zoo | (Nashville, TN) |
| National Anti-Vivisection Society | (Chicago, IL) |
| National Aquarium in Baltimore | (Baltimore, MD) |
| National Aviary | (Pittsburgh, PA) |
| National Disaster Search Dog Foundation | (Ojai, CA) |
| National Education for Assistance Dog Services | (West Boylston, MA) |
| National Humane Education Society | (Charles Town, WV) |
| National Save the Sea Turtle Foundation | (Fort Lauderdale, FL) |
| National Wild Turkey Federation | (Edgefield, SC) |
| National Wildlife Federation | (Reston, VA) |
| Nebraska Humane Society | (Omaha, NE) |
| Nevada Humane Society | (Sparks, NV) |
| New England Anti-Vivisection Society | (Boston, MA) |
| New England Wildlife Center | (South Weymouth, MA) |
| New Hampshire Humane Society | (Laconia, NH) |
| New Hampshire SPCA | (Stratham, NH) |
| Niagara Aquarium Foundation | (Niagara Falls, NY) |
| No More Homeless Pets in Utah | (Salt Lake City, UT) |
| Noah's Ark Animal Rehabilitation Center | (Locust Grove, GA) |
| Noah's Lost Ark | (Berlin Center, OH) |
| North Carolina Aquarium Society | (Raleigh, NC) |
| North Carolina Veterinary Medical Foundation | (Raleigh, NC) |
| North Carolina Zoological Society | (Asheboro, NC) |
| North Shore Animal League America | (Port Washington, NY) |
| Northeast Animal Shelter | (Salem, MA) |
| Northwest Organization for Animal Help | (Stanwood, WA) |
| Oakland Zoo | (Oakland, CA) |
| Ocean Alliance | (Lincoln, MA) |
| Omaha's Henry Doorly Zoo | (Omaha, NE) |
| Operation Kindness | (Carrollton, TX) |
| Orangutan Foundation International | (Los Angeles, CA) |
| Oregon Humane Society | (Portland, OR) |
| Oregon Zoo Foundation | (Portland, OR) |
| Orphans of the Storm | (Riverwoods, IL) |
| Oshkosh Area Humane Society | (Oshkosh, WI) |
