McGregor is an unincorporated community and census-designated place in northeastern Williams County, North Dakota, United States. It lies along North Dakota Highway 40, northeast of the city of Williston, the county seat of Williams County. McGregor's elevation is 2,218 feet. Although unincorporated, it has a post office, with the ZIP code of 58755. It wa…McGregor is an unincorporated community and census-designated place in northeastern Williams County, North Dakota, United States. It lies along North Dakota Highway 40, northeast of the city of Williston, the county seat of Williams County. McGregor's elevation is 2,218 feet. Although unincorporated, it has a post office, with the ZIP code of 58755. It was first listed as a CDP prior to the 2020 census.
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