It's likely you're thinking of the raccoon, which is often called a "coon" for short. Raccoons are mammals with masked faces, nimble paws, and a reputation for being clever and mischievous.
While they have some cat-like features, like their agility and nocturnal habits, they're not closely related to cats. They belong to the Procyonidae family, which includes other animals like kinkajous and coatis.