Alexander Muir (5 April 1830 – 26 June 1906) was a Canadian songwriter, poet, soldier, and school headmaster.

[3] Muir taught in the Greater Toronto Area in such places as Scarborough (School Section # 6 in what is now Woburn.

When the cornerstone of the Christian Church in Newmarket was being laid on 25 June 1874, by the Governor General, Lord Dufferin, Muir brought his school choir to the event to sing his new composition "The Maple Leaf Forever", its first public performance.

Although Muir's musical activities were on an amateur level, they were strongly emphasized along with athletics and patriotism during his teaching career.

He then looked for an existing melody that would fit, a very common practice (it was not unusual for a poem printed in a journal to bear the statement "May be sung to the tune of...").