South Bend is a city in St. Joseph County, Indiana, United States, and its county seat. It lies along the St. Joseph River near its southernmost bend, from which it derives its name. It is the fourth-most populous city in Indiana with a population of 103,453 at the 2020 census. Located directly south of Indiana's northern border with Michigan, South Bend anchors the broader Michiana region. Its metropolitan area had a population of 324,501 in 2020, while its combined statistical area had 812,199 residents.