He was born in Moose Creek, Ontario, the son of David D. Munroe and Mary McRae, and was educated in Moose Creek, in Cornwall and at McGill University where he received his M.D.
Munroe moved to Welwyn, Saskatchewan in 1908 and practised medicine there for 22 years.
Munroe served in the provincial cabinet as Minister of Public Health.
[1] He was defeated by Arthur T. Procter when he ran for reelection to the provincial assembly in 1934.
[1] The Canadian Cancer Society established the annual Munroe Lectures, named in his honour, in 1954.