Detweiler is a surname of German origin. Notable people with the surname include:Alan Detweiler (1926–2012), Canadian composer, writer, and patron of the arts Chip Detweiler (1932–1984) American architect Craig Detweiler, American writer, filmmaker and cultural commentator Ducky Detweiler (1919–2013), former Major League Baseball player Frederick German Detweiler (1881–1960), American sociologist and expert on race relations Robert Detweiler (1930–2003), American competition rower, Olympic champion, naval officer, and scientist