Moenkopi is a census-designated place (CDP) in Coconino County, Arizona, United States, adjacent to the southeast side of Tuba City off U.S. Route 160. The population was 964 at the 2010 census.

Coconino County is a county in the north-central part of the U.S. state of Arizona. Its population was 145,101 at the 2020 census. The county seat is Flagstaff. The county takes its name from Cohonino, a name applied to the Havasupai people. It is the second-largest county by area in the contiguous United States, behind San Bernardino County, California. It has 18,661 sq mi (48,300 km2), or 16.4% of Arizona's total area, and is larger than the nine smallest states in the U.S.