The Ewalt House was a historic house in the Lawrenceville neighborhood of Pittsburgh, Pennsylvania, and a contributing property in the Lawrenceville Historic District. It was built as a country estate sometime between 1787 and 1840 by Samuel Ewalt, and remained standing after most of the land was subdivided for residential lots in the 1870s. The house was notable as a rare example of an antebellum Greek Revival house in Pittsburgh, and exemplified the typical pattern of development in Lawrenceville in the mid to late 19th century. In 2019, the building was nominated as a Pittsburgh historic landmark.