Bomi is a county in the northwestern portion of the West African nation of Liberia. The county was established in 1984. The county's area is 746 square miles (1,900 km2).

Tubmanburg, also known as Bomi and formerly known as Vaitown, is the capital of Bomi County in Liberia. It lies in the Bomi Hills northwest of Monrovia and was an iron ore and diamond mining centre until it was largely destroyed in the First Liberian Civil War. During the Second Liberian Civil War, it was the headquarters of the Liberians United for Reconciliation and Democracy rebel group. Most residents are members of the Vai tribe.