Lemuel John Tweedie (November 30, 1849 – July 15, 1917) was a Canadian politician. His law partner in Chatham, New Brunswick for a time was Richard Bedford Bennett, later Prime Minister of Canada; and for a time Max Aitken was his office boy. A former supporter of the federal Conservatives, he joined the Liberal Cabinet of New Brunswick Premier Andrew George Blair serving as Surveyor-General and Provincial Secretary in successive Liberal governments. Tweedie became the tenth premier of New Brunswick in 1900 and led the party to a large majority government in the 1903 election.