The Lawrence County Courthouse is a courthouse at 315 West Main Street in the center of Walnut Ridge, Arkansas, United States, the county seat of Lawrence County.

It is a modern single-story building, finished in brick with cast stone trim.

It was designed by the Arkansas firm Erhart, Eichenbaum, Rauch & Blass, and was built in 1965–66.

It stylistically embodies the New Formalism movement in architecture of that period, with tall and narrow windows topped by cast stone panels, and a flat-roof canopy sheltering a plate glass entrance area.

[2] The building was listed on the National Register of Historic Places in 2015.