Maryland County is a county in the southeastern portion of the West African nation of Liberia. One of 15 counties that comprise the first-level of administrative division in the nation, it has two districts. Harper serves as the capital with the area of the county measuring . As of the 2008 Census, it had a population of 136,404, making it the seventh most populous county in Liberia.
Named after the State of Maryland in the United States, it was an independent country as the Republic of Maryland from 1854 until it joined Liberia in 1857. The most populous city in the county is Pleebo with 22,963 residents, while Maryland's County Superintendent is Nazarine Tubman. The county is bordered by Grand Kru County to the west and River Gee County to the north. The eastern part of Maryland borders the nation of Côte d'Ivoire, separated by the Cavalla River.