The branch says it needs new homes for the adult cats to make space for the kittens it is expecting to receive.
It supports cats and kittens across the city, covering postcodes MK1 to MK19 and MK46.
A spokesperson for the branch told the Citizen: "All rescues get busy this time of year and Cats Protection Milton Keynes is no exception!
"We have 40 cats and kittens in our care, with some cats having spent several months waiting for homes.
"Stormie, for example, has been waiting for over 150 days!
"It's important they get adopted soon so they can get settled with their forever family, and so we can free space to accept other cats desperate to come into our care.
"Mittens and Tinkerbelle could suit most homes, and Mittens may even be able to live with another cat.
"Stormie is looking for a pet-free and child-free peaceful home.
"We know the right family is out there for all of them!"
Applications to adopt the cats must be made through the branch’s website, but first have a look through our gallery to find out a bit more about these lovely cats in search of new owners and a happy home.
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9. Tinkerbelle
Tinkerbelle, aged three, is a black and white female who would be OK with older children but not dogs Photo: Fosterers of Cats Protection Milton Keynes
10. Tinkerbelle
Tinkerbelle is described as a sweet and slinky cat, who loves strokes, headbutts and having her tummy tickled! Photo: Fosterers of Cats Protection Milton Keynes