Ronneby is an unincorporated community and census-designated place (CDP) in Maywood Township, Benton County, Minnesota, United States.

[4] The community is located along State Highway 23 (MN 23) near Benton County Road 6.

Ronneby is part of the Saint Cloud Metropolitan Statistical Area.

[6] In the early 20th century, Ronneby was at its height, featuring a hotel, a newspaper, a lumber mill, and three stores.

[11] According to the United States Census Bureau, Ronneby has a total area of 1.0 square mile (2.6 km2), all land.

33.3% of all households were made up of individuals, and 16.7% had someone living alone who was 65 years of age or older.