Walter Windsor (18 July 1884 – 29 June 1945) was a British Labour Party politician. A native of Bethnal Green in the East End of London, he held a seat in the House of Commons from 1923–29, and from 1935–45, when he died.
Windsor was elected at the 1923 general election as the Member of Parliament (MP) for Bethnal Green North East, an area where his family had lived for six generations. Through the 1920s it was a marginal seat between the Liberal Party and Labour Parties, and Windsor won it narrowly at two elections, holding the seat from 1923-29.
He had contested the seat unsuccessfully in 1922 as a "Labour" candidate, even though he had been nominated by the Communist Party, and had not received the endorsement of the Labour Party. He was beaten in 1922 by the Liberal Garnham Edmonds, a former Mayor of Bethnal Green, who had won the seat in a 4-way contest with a majority of only 115 (0.8%) votes over Windsor. However, in a three-way contest in 1923 Windsor was an official Labour candidate and took the seat with a majority of 625 votes (3.9%).
The Conservative Party candidate Robert Tasker had fought an unconventional campaign, proclaiming that he was "without any organisation or the usual machinery", and won only 12.5% of the votes.
On 15 January 1924, as peers and MPs assembled for the State Opening of Parliament, Windsor and fellow MPs Clement Attlee and John Scurr joined a demonstration outside Temple Gardens on the Victoria Embankment which had been organised by the National Unemployed Workers' Movement. Windsor marched with a contingent of workers from Bethnal Green.