High Quality Content by WIKIPEDIA articles! U.S. Route 275 (US 275) is a north–south United States highway. It is a branch of US 75, originally terminating at that route in Council Bluffs, Iowa. The highway`s northern terminus is in O`Neill, Nebraska, at an intersection with U.S. Highway 20 and U.S. Highway 281. Its southern terminus is near Rock Port, Missouri, at an intersection with U.S. Highway 136.