Round Lake is a city in Nobles County, Minnesota, United States.

The town of Round Lake is located in the extreme southeast corner of Nobles County.

A site for a railroad station was chosen in fall of 1882, and the initial choice of name was Indian Lake, after the township in which it was located.

However, a wealthy Chicago Board of Trade operator named Mr. O. H. Roche donated 20 acres (81,000 m2) of land for a townsite, and it was his wish that it be called Round Lake.

A post office named Indian Lake was established in March 1884, and Mr. Tripp became the postmaster.

In 1889, the town was re-platted, correcting some legal issues with the original plat, and real growth began.

Nine years later, Round Lake boasted numerous businesses, a bank, a newspaper, and 179 residents.

The town hosts many events like the Horned Trout Tournament held every July, Sun-and-Fun Day in June, and Soupstock in August.

Round Lake is located in Minnesota's 1st congressional district, represented by Jim Hagedorn, a Republican.

At the state level, Round Lake is located in Senate District 22, represented by Republican Bill Weber, and in House District 22B, represented by Republican Rod Hamilton.

Council members are Walon Habben, Court Baumgard, Dennis Bucholz, and Gary Larson.