大巴萨县（英文：Grand Bassa County）是利比里亚15县之一，首府布坎南 (英文:Buchanan).

利比里亚县级行政区 伯米 · 邦 · 巴波卢 · 大巴萨 · 大角山 · 大各德 · 大克鲁 · 罗发 · 马及比 · 玛丽兰 · 蒙特塞拉多 · 宁巴 · 里弗塞斯 · 吉河 · 习诺

Grand Bassa is a county in the west-central 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 eight districts. Buchanan serves as the capital with the area of the county measuring 7,936 square kilometres (3,064 sq mi). As of the 2008 Census, it had a population of 224,839, making it the fifth most populous county in Liberia.