Terwilliger can refer to:
People and fictional characters Brian J. Terwilliger (born 1976), movie director G. Zachary Terwilliger (born 1981), former United States Attorney for the Eastern District of Virginia George J. Terwilliger III (born 1950), former United States Deputy Attorney General George Terwilliger (1882–1970), American silent film director and screenwriter James Terwilliger (1809–1892), Oregon pioneer Joseph Terwilliger, American geneticist Robert Underdunk Terwilliger Jr. or Sideshow Bob, a fictional character from The Simpsons Ron Terwilliger (born 1941), American housing developer Wayne Terwilliger (1925–2021), American baseball player, second baseman in Major League Baseball
Places in the United States Terwilliger, Portland, Oregon, a neighborhood Terwilliger Boulevard, a major road and parkway in Portland, Oregon Cougar Hot Springs, also known as Terwilliger Hot Springs, geothermal pools in Oregon
Buildings in the United States Terwilliger House, Registered Historic Place in McHenry County, Illinois Terwilliger House (Shawangunk, New York), a Federal style stone house built around the turn of the 18th century Terwilliger Brothers Field at Max Bishop Stadium, a baseball stadium at the United States Naval Academy, Annapolis, Maryland