List of national monuments of the United States

Nine federal agencies in five departments manage the 138 current U.S. national monuments. Of these, 121 monuments are managed by a single agency, while 17 are co-managed by two agencies. Two of the NPS's national monuments, Grand Canyon–Parashant and Avi Kwa Ame, are not official units because they overlap with Lake Mead National Recreation Area. Management practices vary across agencies and sites according to their missions, the size or type of protected place, and legal authorization. Generally, hunting, fishing, and extraction of resources are prohibited. Monuments and memorials that were not designated by the U.S. government, such as the USS Maine National Monument, are not listed here. ==List of national monuments==