Career
First elected in 1958, Mann was re-elected every two years through the 1982 general election. He represented the old districts 10, 18A, 27A and, later, District 28B, which included all or portions of Cottonwood, Jackson, Martin, Nobles and Watonwan counties, changing somewhat through state redistricting in 1960, 1970 and 1980. While in the legislature, Mann earned a reputation as a strong advocate for farmers, and as a leader on issues relevant to agricultural and transportation.
He allied with the Liberal Caucus at a time when the legislature was still officially nonpartisan, and later identified as a Democrat when party affiliation became required of candidates.
Mann served on the House Agriculture, Appropriations, Commerce, Crime Prevention, Education, Financial Institutions & Insurance, Rules & Legislative Administration, and Transportation committees, and on various other committee incarnations and subcommittees during his 25 years in office. He was chair of the House Agriculture Committee from 1973–1980 and of the House Transportation Committee from 1983–1984, and also served as an assistant majority leader from 1979-1982.
After his death, the Minnesota Legislature and Governor Rudy Perpich named Minnesota Highway 60 from Mankato to Brewster the “George Mann Memorial Highway” in his honor.