Mabel Ridealgh née Jewitt (11 August 1898 – 20 June 1989) was an English Labour and Co-operative politician. She was Member of Parliament for the Ilford North constituency between 1945 and 1950, before becoming General Secretary of the Women's Co-operative Guild.

Mabel Jewitt was born on 11 August 1898 to Mark Jewitt and Lucy née Burton in Wallsend-on-Tyne, Northumberland.^[1] She began her career working in the civil service. She joined the Women's Co-operative Guild (WCG) in 1920 and the Labour Party the following year. During World War II she worked for the Board of Trade.^[1]

Ridealgh was elected as a Labour and Co-operative Member of Parliament for the newly created seat of Ilford North constituency in the 1945 general election.^[2][1] She campaigned on issues such as National Insurance, housing and nursery schools. She lost the seat in 1950, when it was gained by the Conservatives.^[1] She then became General Secretary of the Women's Co-operative Guild from 1953 until 1963.^[1]

Jewitt married Leonard Ridealgh in 1919 and the couple moved to Enfield in north London. She had a daughter and a son, before her husband died in 1956. She died on 20 June 1989 and was then cremated at the City of London crematorium.^[1]