John Christianson

John Aaron Christianson (born November 23, 1923 in Langruth, Manitoba) is a retired politician in Manitoba, Canada. He served in the Legislative Assembly of Ontario as a Progressive Conservative from 1959 to 1962 and was a cabinet minister in the government of Dufferin Roblin.

Christianson was educated at the University of Manitoba, earning a Bachelor of Science degree in Mechanical Engineering. He worked as an automobile and implement agent, and was the president of Christianson Ltd. and Koko Platz Development Ltd. From 1942 to 1945, he served as a pilot in the Royal Canadian Air Force. Concurrent with his career in provincial politics, he was a city alderman in Portage La Prairie in 1959-60.

He was elected to the Manitoba legislature in the 1959 provincial election, defeating incumbent Liberal-Progressive Charles Greenlay by 473 votes in the Portage La Prairie constituency. He was appointed to Roblin's cabinet on October 25, 1961 as Minister of Welfare.

Christianson's time in office was brief, as he narrowly lost his seat to Liberal candidate Gordon Johnston in the 1962 election. He formally resigned from cabinet on February 27, 1963. He attempted a returned to the legislature in the 1966 election, but again lost to Johnston by an increased margin. Some believe Christianson lost his riding because of local opposition to the Portage Diversion flood relief project.