| Madi | DSH | Raleigh,NorthCarolina | USA |
| Maebe Isadora | Bengal | WA | Australia |
| Maggie May | Calico | Coastal,NorthCarolina | USA |
| Maggy | Himalayan, Tortie Point | Florida | USA |
| MandaBurms | Burmese | KapitiCoast | New Zealand |
| Mandu | Himalayan | Connecticut | USA |
| Manny | Tabby | Parma,Ohio | USA |
| Marie | Persian | NewJersey | USA |
| Marko Meowii | DSH | Pittsburgh,Pennsylvania | USA |
| Marley Merritt | Ragdoll | Alabama | USA |
| Melvin | Teacup Blue Point Himalayan | PalmHarbor,Florida | USA |
| Merlin | Siamese | NewYork | USA |
| Mesew Shnugally and Tom | Bengal & Tuxedo | Sydney | Australia |
| Mia & Mika | Unknown | Selangor | Malaysia |
| Mikey | DLH | California | USA |
| Milo | Unknown | Louisiana | USA |
| Milo & Alfie | Domestic Short Hair | Sidmouth,Devon | England |
| Misha | Russian Blue | Auckland | New Zealand |
| Misha-mao artist-cat | DSH Mix | Texas | USA |
| Mishka, Milakoshka, & Zateynik (BJ) | Siberian | Minneapolis,Minnesota | USA |
| Miss Molly | Unknown | Thurmont,Maryland | USA |
| Miss Moo | Moggie | Tennessee | USA |
| Moggy | Unknown | Derbyshire | England |
| Molly, Casper, Ben, Archie | Various | Ontario | Canada |
| Monkey Cat | DSH Tortoiseshell | LosAngeles,California | USA |
| Mousie | Tabby | London | England |
| Mowser | Unknown | California | USA |
| Mr Breeze | DSH | Pennsylvania | USA |
| Mr. Hendrix the Kitty | Domestic Shorthair | ButlerCounty,Ohio | USA |
| Ms. P and Cinza | Unknown | Toronto,Ontario | Canada |
| Muffin | Unknown | Kent | England |
| Musette | Birman | Craiova | Romania |
| My Visitor | Unknown | Victoria | Australia |
