Hilda Mason ARIBA was an English architect, born in 1879. She took up architecture during the First World War, and after a period of employment as a secretary in an Ipswich practice and studies at the AA School in London, she became, at the age of 39, one of very first few women to qualify as architects.

She designed, with Raymond Erith, the grade-II* listed St Andrew's Church, Felixstowe, in 1929-1930, thought to be the first church to be built in England using reinforced concrete, and which took its inspiration from Perret's Notre-Dame, Le Raincy, in Paris.