Yuma County, Arizona

county in Arizona, United States

Yuma County is a county in the southwestern part of the U.S. state of Arizona. As of the 2020 census, 203,881 people lived there.[1] The county seat is Yuma.[2]

The county borders three states: Sonora, Mexico, to the south, and two other states to the west, across the Colorado River: California of the United States and the Mexican state of Baja California.

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