Marysburg is an unincorporated community in Blue Earth and Le Sueur counties in the U.S. state of Minnesota.

Marysburg is located within ZIP code 56063 based in Madison Lake.

Nearby places include Madison Lake, Elysian, Cleveland, Mankato, and Kasota.

Marysburg, a community at the south edge of Washington Township, in section 15, platted January 24, 1859,[2] was named by its first settler, John L. Meagher, an immigrant from Ireland, who was its postmaster during many years, and was also the probate judge for Le Sueur County.

Marysburg was originally settled by immigrants from both Ireland and Germany.