Christopher Rousby patented Croome in 1671. It was the home of Thomas John Claggett (1743-1816), the first Episcopal Bishop of Maryland in 1792, the first Protestant bishop consecrated in the United States, and the first chaplain of the U.S. Senate. In August 1814 British forces marched through before burning Washington. A post office was established at Croom in 1855, and by 1873 it was a stop on the Pope's Creek branch of the Baltimore & Potomac Railroad.