Roy (also known as Roytown) is an unincorporated community located approximately two miles south of Castor in Bienville Parish in northern Louisiana, United States.

Alberta began when E. M. Werkheiser established a sawmill, and the Louisiana and Arkansas Railway came into the area.

By 1900, some three hundred were employed at a sawmill of the Bienville Lumber Company, which built a school, which also served as a chapel for area churches.

A post office operated at Alberta until 1927[2] Later, across from the Martin company sawmill were a grocery store and a gasoline station.

Nelson Creek, a branch of Black Lake Bayou, traverses Roy.