The W.F. & Estelle McWilliams House is a historic house at 314 Summit Avenue in El Dorado, Arkansas. The two story brick house was built in 1922 for William and Estelle McWilliams, early in El Dorado's oil boom, which was prompted by the discovery of oil in 1921. McWilliams was a prominent local businessman who operated a number of retail business, was a local bank director, and built the Rialto Theatre. The McWilliams house is a stylistically eclectic combination of Craftsman, Classical Revival, and Mission/Mediterranean styling. Based on stylistic evidence, it may have been designed by the Little Rock firm of Kolben, Hunter and Boyd.