Louis Orville Breithaupt

The Honourable Louis Orville Breithaupt
18th Lieutenant Governor of Ontario
In office February 18, 1952 – December 30, 1957
Monarch	Elizabeth II
Governor General	Vincent Massey
Premier	Leslie Frost
Preceded by	Ray Lawson
Succeeded by	John Keiller MacKay
Member of the Canadian Parliament for Waterloo North
In office August 19, 1940 – February 18, 1952
Preceded by	William Daum Euler
Succeeded by	Norman Schneider
Constituency	Waterloo North
Personal details
Born	(1890-10-28)October 28, 1890 Kitchener, Ontario
Died	Toronto, Ontario
Spouse(s)	Sara Caskey Mabel Louise White
Relations	Louis Jacob Breithaupt (father)
Children	Louis Paul Breithaupt
Alma mater	University of Toronto
Occupation	Businessman
Profession	Politician
Religion	United Church of Canada

Louis Orville Breithaupt (October 28, 1890 – December 12, 1960) served as the 18th Lieutenant Governor of Ontario, Canada, from 1952 to 1957.

Born in Berlin (later Kitchener), Ontario, the son of Louis Jacob Breithaupt and Emma Alvarine Devitt, he was educated at the University of Toronto. He became head of his family's leather business, Breithaupt Leather Company, in Kitchener. He was a Kitchener alderman for four years, and in 1923 became the youngest mayor in the city's history. He was a Liberal Member of Parliament from 1940 to 1952.

Breithaupt was appointed Lieutenant Governor of Ontario in 1952 and served until 1957.

In 1953, he was awarded an honorary LL.D from McMaster University.

Breithaupt was active in many service organizations, such as the YMCA and Rotary Club. In 1959, he became Chancellor of Victoria University. Breithaupt died in Toronto in 1960 at the age of 70.