Robertsport is a town in western Liberia, about 10 miles from the Sierra Leone border. It is named after Joseph Jenkins Roberts, the first president of Liberia. The town lies on Cape Mount peninsula, a spit of land separating the brackish lagoon Lake Piso from the Atlantic Ocean,50 mi (80 km) north-west of Monrovia. It serves as the capital of Grand Cape Mount County and is the home of the city corporation.