Leslie Tom Morris (1904 - 1964) was a Canadian politician, journalist and long time member of the Communist Party of Canada and, its front group, the Labour Progressive Party.

Morris was born in the United Kingdom to a Welsh working class family. He and his family immigrated to Canada in 1910. Morris returned to Britain in 1917 and lived in Wales and England while working in the steel, coal mining and railway industries. He returned to Canada in time to join the Communist Party of Canada at its founding convention held in December 1921.

He became a prominent figure in the party first as secretary of the Young Communist League of Canada from 1923 to 1924 and then as editor over the years of various Communist newspapers including The Worker, Daily Clarion, Daily Tribune and Canadian Tribune.

Morris supported Tim Buck and the supporters of Stalin in the party during the factional struggles and purges of the late 1920s and early 1930s.

He was a candidate for the Canadian House of Commons on several occasions. In the 1940 Canadian election he ran as a Communist in Winnipeg North coming in third place with 17% of the vote, which was larger than the number of votes separating the Conservative victor from the defeated CCF incumbent, A. A. Heaps. In a 1954 by-election Morris was the Labour Progressive candidate in York West and came in fourth (and last) place with only 282 votes. In the 1958 Canadian election he ran in York South placing fourth out of five candidates with 427 votes. In the 1962 Canadian election he ran for the Communist Party in the Toronto riding of Trinity winning 449 votes, he tried again in the 1963 Canadian election in the same riding and garnered 391 votes

Morris was a popular stump speaker for the party and toured the country speaking to left wing and labour audiences. From 1954 until 1957 he was the nataional organizer of the Labour Progressive Party (as the Communist Party had been known since 1943) and, in 1962, he succeeded Tim Buck as General Secretary of the Communist Party of Canada (as it was again known) and held the position until his death two years later.