The Audubon County Home Historic District, also known as the Nathaniel Hamlin Park & Museum, is a nationally recognized historic district located south of Audubon, Iowa, United States.

The place became known as Blue Grass Grove because of a legend that they spilled bluegrass seed from their wagons.

The county purchased the property in 1890, and built the Renaissance Revival style home as a care facility.

The facility stood empty for several years when it was designated as a preservation project to observe the United States Bicentennial.

This article about a property in Audubon County, Iowa on the National Register of Historic Places is a stub.