Please provide more context about the location or region you are asking about in order for me to give you an accurate answer on which county it borders.
wzup
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.
Lee County in Virginia borders Wise County to the north and Scott County to the east.
Brazoria County in Texas is bordered by Fort Bend County to the north, Galveston County to the east, Matagorda County to the southwest, and Wharton County to the west.
Essex County in New York and Somerset County in Maryland were named for the English counties they resemble, which in turn are named after the rivers they border.
None. County Offaly and County Kilkenny do not have a border.
Lincoln County, which is on the border with Alabama.
Monmouth County, Ocean County, and Atlantic County.
wzup
Catron County on the Arizona border.
Limerick and Cork are the counties that border county Kerry.
Canada
Cambridgeshire/Norfolk Border
The Mississippi River runs along the northeastern border of Dakota County, Minnesota.
Shropshire is the Welsh county adjacent to the Welsh border. It is located in England and borders Wales to the east.
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.
Kossuth County is a county in northern Iowa along Iowa's border with Minnesota.