The Security State Bank, on Garfield St. in Willow Lake, South Dakota, was built in 1909.

It was also deemed important "for its contribution to commerce and economic development in Willow Lake, South Dakota.

Willow Lake is a rural community whose primary source of economic activity is agricultural.

Rural banks of this type were critical for the economic stability of this community and conservatism.

This article about a property in South Dakota on the National Register of Historic Places is a stub.