The James C. Tappan House, also known as the Tappan-Pillow House, is a historic house at 717 Poplar Street in Helena, Arkansas. It is a two-story wood-frame structure, three bays wide, with a hip roof. A two-story porch projects from the main facade, topped by a Greek Revival triangular pediment with brackets. The porch is supported by square columns and has urn-shaped balusters.