Peter Arnold Brown (April 27, 1927^[1] in Winkler, Manitoba^[2] – March 5, 1994) was a politician in Manitoba, Canada. He was a member of the Legislative Assembly of Manitoba from 1973 to 1988, representing the riding of Rhineland for the Progressive Conservative Party.^[1]

The son of Isaac J. Brown and Katherine Hamm, he was educated in Rosenbach and Winkler. In 1960, he married Katie Jansen. Brown worked as a businessman and a farmer before entering political life. He served as a councillor in the town of Winkler from 1967 to 1974, and was the first vice-president of the Manitoba Beet Growers Association for a time, as well as serving on several local boards.^[2]

Brown was first elected to the Manitoba legislature in the provincial election of 1973, defeating Social Credit Party leader and MLA Jacob Froese^[1] by about 1,400 votes (the Social Credit Party would never again elect an MLA in Manitoba). He was re-elected in the 1977 election, which the Tories won under Sterling Lyon; Brown, however, was not appointed to cabinet. He was re-elected in the elections of 1981 and 1986, and resigned in 1988 when his riding was eliminated through redistribution.^[1] He died in Winkler in 1994.^[3]