William James Field (22 May 1909 – 11 October 2002) was a British politician whose career was ended by a conviction for "importuning for immoral purposes" in 1953. He was Labour Member of Parliament for Paddington North from 1946 to 1953.
Field was the son of a solicitor and grew up in south-west London. He was educated at Richmond County School and went on from there to the University of London where he took an active part in student politics, opposing appeasement of Germany. On the outbreak of World War II, he enlisted in the Royal Army Service Corps and later served in the Intelligence Corps. At the end of the war, Field was demobilised swiftly as he had been selected as Labour Party candidate for Hampstead; in the Labour landslide election of 1945, Field reduced a Conservative majority of over 20,000 to 1,638.
Later that year Field was elected to Hammersmith Borough Council. He swiftly became the dominant figure and was made council leader the following year. He was also selected to follow Sir Noel Mason-Macfarlane as Labour candidate for Paddington North following Mason-Macfarlane's resignation for ill-health reasons, and retained the seat. He improved his majority against the national trend in the 1950 general election, and was appointed as Parliamentary Private Secretary to Michael Stewart and John Strachey.