St. Robert is a city in Pulaski County, Missouri, United States. It is a gateway community to the United States Army Maneuver Support Center of Excellence Fort Leonard Wood. It is named after the local Catholic parish, whose patron saint was an important early Jesuit. According to the United States Census Bureau, the city has a total area of 7.2 square miles (19 square kilometers), all of it land. Historic Route 66 runs through St. Robert.