Nicollet County Minnesota (Historic Districts) has 3 places on the National Register of Historic Places including 2 places of Statewide significance. Significant places include Fort Ridgely and Fort Ridgely State Park CCC/Rustic Style Historic Resources, St. Peter Commercial Historic District.
Some of the country's most noteable architects helped create the Nicollet County places including Edward P. Bassford. Prominent architectural styles found in Nicollet Country are Queen Anne and Second Empire.