San Luis is a city in Yuma County, Arizona, United States. The population was 35,257 at the 2020 census. It is part of the Yuma Metropolitan Statistical Area. San Luis, located in the southwest corner of the state directly adjacent to Mexico's Federal Highway 2 at San Luis Rio Colorado, was the second fastest-growing city or town in Arizona from 1990 to 2000. According to 2022 Census Bureau estimates, the population of the city is 35,770.
Border wall between the United States and Mexico in San Luis
Yuma County is a county in the southwestern corner of the U.S. state of Arizona. As of the 2020 census, its population was 203,881. The county seat is Yuma.
Image: Old Yuma City Hall
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Image: Ocean to Ocean Bridge, Yuma, AZ
Image: Yuma County Courthouse