How many miles is Maricopa County AZ from the Mexican border?

As the crow flies, it is about 30 miles from the southwesternmost corner of Maricopa County, Arizona, to the Mexican border.

By driving distance, it's about 79 miles from Gila Bend in Maricopa County to Sonoyta, Sonora, on the Mexican border, or about 48 miles from the Maricopa County line to the Mexican border at Sonoyta along AZ-85.