Minn. Stat. § 375.39
A county board may change the name of the county upon a petition signed by a number of the legal voters of the county equal to 55 percent of the votes cast at the last preceding general election, and shall adopt the new name suggested in the petition as the official name of the county. The petition shall be filed with the county auditor who shall then promptly give public notice of the filing of the petition by publishing it in the official newspaper of the county. The petition shall be considered at the next meeting of the board held not less than 30 days after the date of the notice.
The petition being granted, the board shall make a formal order to that effect, which shall be filed with the auditor. After filing, the official name of the county shall be the one adopted.
Minn. Stat. § 375.39
(674, 675) 1905 c 23 s 1,2; 1984 c 629 s 2