William Ernest Tummon (6 February 1879 – 14 December 1960) was a Conservative member of the House of Commons of Canada.
He was born in Huntingdon Township, Ontario in Hastings County and became a contractor and farmer.
Tummon attended public and secondary school in Hastings County.
He was a councillor at Huntington Township for 14 years and a reeve there for five years.He was first elected to Parliament at the Hastings South riding in the 1925 general election then re-elected in 1926 and 1930.
Tummon was defeated by John Charles Alexander Cameron of the Liberal party in the 1935 election.