South Troy is an unincorporated community in Zumbro Township, Wabasha County, Minnesota, United States.

Nearby places include Hammond, Zumbro Falls, Mazeppa, Potsdam, and Oronoco.

South Troy was known for being a home for Laura Ingalls Wilder, the writer of the Little House on the Prairie series of books, and her family for a short time in the summer of 1876.

This is where Charles and Caroline Ingalls fourth child, and their only son, Charles Frederic 'Freddy' Ingalls (November 1, 1875 in Walnut Grove, Minnesota – August 27, 1876 in South Troy), died at the age of 10 months.

This article about a location in Wabasha County, Minnesota is a stub.