Pitcher Ila Borders of the Duluth-Superior Dukes is the first woman to win a men's regular season professional baseball game. The Dukes beat the Sioux Falls Canaries 3-1, in Duluth.

Joseph A. A. Burnquist is born in Dayton, Iowa. Between 1915 and 1921 he would serve as the nineteenth governor of the state and lead the Minnesota Commission of Public Safety. He died in Minneapolis on January 12, 1961.

James J. Hill arrives in St. Paul to work as a shipping clerk for J. W. Bass and Company. He later made his fortune as a railroad baron and business tycoon.

The members of Captain Stephen Kearny's expedition to find a road from Council Bluffs, Iowa, to Fort St. Anthony (later called Fort Snelling) arrive at Lake Pepin, having lost their way. Kearny then marches his men north to the fort.

Lewis Cass, governor of Michigan (which at the time included present-day Minnesota), reaches what he erroneously believes to be the source of the Mississippi River: a lake called Gaa-miskwaawaakokaag (where there are many red cedars) by the Ojibwe. Afterward, settler-colonists began to call it Cass Lake.

Minneapolis holds its first Aquatennial, a festival celebrating Minnesota's summers.

Two people are killed and sixty-seven are injured in a clash between strikers and police during a truckers' strike in Minneapolis. After federal mediation fails, Governor Floyd B. Olson declares the city under martial law, and the National Guard takes control of the streets.

The Western Federation of Miners calls a strike on the Mesabi Iron Range. Two hundred union men had been laid off from Mountain Iron Mine, owned by the Oliver Iron Mining Company, a subsidiary of US Steel. Although layoffs on the range were common, at issue was recognition of the union, which was threatened by the discharge of only union workers. Within two months a large number of imported scabs undermine the union's efforts and the strike is broken.

Polk County is established and named for James K. Polk, who was president when Congress authorized creation of Minnesota Territory.

Bagone-giizhig (Hole-in-the-Day the Younger), Eshkibagikoonzh (Flat Mouth), Lawrence Taliaferro, Henry H.