Patrick "Pat" Clifton, known to his friends as Postman Pat, is the main character of the series. He is the village postman for Greendale and the head postman for the Special Delivery Service in Pencaster. Pat lives at Forge Cottage in Greendale with his wife Sara and son Julian, who is six years old. His pet cat Jess also comes with him on his post rounds.

He lives with the Greendale villagers, Miss Hubbard, George Lancaster, Alf Thompson, Dorothy Thompson, Ted Glen, Mrs. Goggins, her dog Bonnie, P.C. Selby, and the Reverend Timms.