Olive Branch is a city located in DeSoto County, Mississippi, United States. With a population of 39,711 at the 2020 census, it is the sixth most populous city in Mississippi. A suburb of Memphis, Olive Branch is part of the Memphis Metropolitan Statistical Area, a region that consists of three counties in southwest Tennessee, five counties in northwest Mississippi, and one county in eastern Arkansas. Along with other rapidly growing places in DeSoto County, Olive Branch attributes most of its growth and development to urban sprawl and flight radiating out from Memphis.