Granny Dryden was an old lady who lived in a cottage in the countryside outside Greendale.
She has a daughter who lives in London with a family. They often come up to Greendale to see Granny Dryden for her birthday.
- Season 1 - Postman Pat's Birthday, Postman Pat's Tractor Express, Postman Pat's Thirsty Day, Postman Pat's Windy Day, Letters on Ice and Postman Pat takes a Message (mentioned)
- Season 2 - Postman Pat and the Suit of Armour, Postman Pat Misses the Show, Postman Pat Paints the Ceiling, Postman Pat and the Big Surprise, Postman Pat and the Beast of Greendale and Postman Pat and the Mystery Tour
- Postman Pat's ABC
- Postman Pat's 123 (mentioned)
- Postman Pat takes the Bus
- Postman Pat and the Tuba
- Postman Pat and the Barometer
- Read Along with Postman Pat
- She was voiced by Ken Barrie.
- She has not appeared since Season 2; it is possible she has quietly passed away since then.