Ethel Mary Lambert (née Coote) (1879-1956) was a Labour Party politician in the Poplar area.
Born in 1879 in Hoole, Cheshire, she was the daughter of William Henry Coote, a contractor. She was orphaned and by 1891 she was living in Chester Workhouse.
She married Albert Robert Lambert, a tram conductor, in the Parish Church of Bromley St Leonard on 7 November 1899.
A member of Poplar Borough Council, she served as Mayor of Poplar for 1937-38.
She was elected to the London County Council in 1934 to represent Poplar, Bow and Bromley in 1934 and held the seat at the next election in 1937. Elections were suspended for the duration of World War Two, and she continued to hold her seat until she was declared disqualified at the council meeting on 17 July 1945.