The largest city by area in the United States is Yakutat, Alaska at 9,459.28 square miles. The second and third largest cities are also in Alaska: Sitka at 2,874 square miles and Juneau at 2,717 square miles.
Yakutat became the largest city in the United States in 1992. It is larger in area than five U.S. states, and is comprised of 80 percent land and 20 percent water. At 758 square miles, Jacksonville, Fla. is the largest city in the contiguous 48 states. The smallest city by area in the United States is West New York, N.J., at 1 square mile.