Postman's Park is a small green memorial garden in the City of London. It is located between King Edward Street, Little Britain and Angel Street. It was created in 1880 from the churchyards of St Leonard, Foster Lane and St Botolph Aldersgate together with the graveyard of Christ Church Greyfriars.

St Leonard's had been a ruin since the Great Fire and was probably demolished at the time of the creation of the park. St Botolph's is still open and stands at the north east corner of the park. Christ Church was detached from its graveyard and is now a ruin on the other side of King Edward Street.

The memorial in the park was the idea of the painter George Frederic Watts who wanted to celebrate the heroism of people who may otherwise have been forgotten. The park's name refers to the postmen who work in the principal London post office and the former sorting office in King Edward Street.