Walter Maxfield Lea (February 10, 1874 – January 10, 1936) was a Prince Edward Island politician. A farmer and livestock breeder by profession, Lea was born in Tryon, the son of William C. Lea and Annie Murphy. He was elected to the provincial House of Assembly in 1915 as a Liberal and became commissioner of agriculture in 1919. In 1930 Lea became premier when his predecessor was appointed to the Supreme Court of Prince Edward Island but the Great Depression took a toll on the government's popularity and he lost the election the next year to the rival Conservative Party of Prince Edward Island.