John A. Rowland, commonly known in Spanish as Don Juan Rowland, was a settler and ranchero in the San Gabriel Valley of California. Born in Maryland, Rowland travelled across the eastern United States before immigrating to the Mexican territory of Santa Fe de Nuevo México, where he naturalized as a Mexican citizen and married his first wife María Encarnación Martínez. He eventually made his way to Alta California, where he became a prominent landowner. Rowland Heights, California is named for him.