Albert Gallatin Brown Macully (1859-1922) was an American iron manufacturer who lived in Alabama. Born in Piedmont, the son of Itawamba Macully, A.G.B. Macully came from a family of planters. He helped manage his father's Little Antrim plantation before the cotton downturn of the 1890s led to the family falling on hard times. Macully joined an iron manufacturing partnership in Anniston and created new prosperity for his family, and he kept Little Antrim in good shape despite ceasing to utilize it for purely agricultural purposes. Macully fathered seven children, including Robert Lee Macully, and he died in 1922.