08/19/2026
Did you know? Mobile County covers 1,644 square miles, making it one of Alabama's largest counties by area. More than 400 square miles of the county are water, thanks to its expansive bays, rivers and coastal waterways. Mobile County is also home to several islands, including Dauphin Island, Gaillard Island and Mon Louis Island. As Alabama's only county with a saltwater port, its geography has played a key role in the region's history, economy and culture.