The Henry Smith Farm, also known as Hidden Spring Farm, is an historic home, barn, and vaulted cellar which are located in Middletown, Dauphin County, Pennsylvania.

It was added to the National Register of Historic Places in 1988.

[1] The house was built in 1806 as a two-story, five-bay, double-pile, brownstone building, and was designed in the Federal style.

The interior has a center hall plan, which was created in the Georgian style.

A vaulted cellar that was built of rubble stone is located near the house.