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Largest counties in Alabama by land area
- Baldwin County – 1,589.78 square miles
- Tuscaloosa County – 1,321.75 square miles
- Clarke County – 1,238.46 square miles
- Mobile County – 1,229.43 square miles
- Jefferson County – 1,111.28 square miles
- Washington County – 1,080.21 square miles
- Jackson County – 1,077.87 square miles
- Covington County – 1,030.46 square miles
- Monroe County – 1,025.67 square miles
- Dallas County – 978.69 square miles
The top 10 largest counties in Alabama by land area cover over 11,000 square miles combined. Baldwin County is the largest single county at nearly 1,600 square miles. The average size of Alabama’s 67 counties is about 782 square miles.