Maseru is the capital and largest city of Lesotho. It is also the capital of the Maseru District. Located on the Caledon River, Maseru lies directly o…Maseru is the capital and largest city of Lesotho. It is also the capital of the Maseru District. Located on the Caledon River, Maseru lies directly on the Lesotho–South Africa border. Maseru had a population of 330,760 in the 2016 census. The city was established as a police camp and assigned as the capital after the country became a British protectorate in 1869. When the country achieved independence in 1966, Maseru retained its status as capital. The name of the city is a Sesotho word meaning "red sandstones".