Ivan Cyrus Wettengel (1876 – February 19, 1935) was a United States Navy Captain who served as the 25th Naval Governor of Guam. A graduate of the United States Naval Academy, Wettengel commanded a number of ships. He received the Navy Cross for his command of the USS Wisconsin during World War I. He also commanded the USS Texas and the Naval Training Station Hampton Roads. During his tenure as governor, he overturned many of the unpopular policies of William Gilmer. He also attempted to assemble a bull-mounted Guam Cavalry, but the initiative failed. A number of locations in Guam are named in his honor.