St. Ignatius Church is a Roman Catholic parish church of the Archdiocese of Washington located at 2315 Brinkley Rd., Fort Washington, MD 20744, in Oxon Hill, Prince George's County, Maryland. The historic church structure was constructed between 1890 and 1891. The -story structure is wood frame, with clapboarding, and shingling in imbricated pattern. It is rectangular in form with a gabled roof, projecting front belfry with spire and louvered openings, round arched openings, and modified corner buttresses. The architectural style is considered Eclectic, with elements of the Shingle and Queen Anne styles. It is the second church on site and has served as a mission and parish church. The original church, built in 1849, was partially funded by Mary Surratt, one of the conspirators involved with the Assassination of Abraham Lincoln.