The John Adams Homestead/Wellscroft is a historic farmstead off West Sunset Hill Road in Harrisville, New Hampshire.

It is one of the least-altered examples of early Cape style architecture in Harrisville, lacking typical alterations such as the additions of dormers and changes to the window sizes, locations, and shapes.

The farmstead, including outbuildings and an area of roughly 2 acres (0.81 ha) distinct from the larger farm property, was listed on the National Register of Historic Places.

The main house is a 1+1⁄2-story wood-frame structure, with a gabled roof, central chimney, and clapboarded exterior.

One of the upstairs rooms also has stencilwork on its walls that may be the work of folk artist Moses Eaton, Jr., a Harrisville resident.