Jamestown is an unincorporated community located along Interstate 40 in McKinley County, New Mexico, United States. The community is the site of the Giant Travel Center, a 38,000-square-foot (3,500 m2) truck stop. Jamestown has its own post office, which is located inside the truck stop's mall; the post office has ZIP code 87347. Jamestown is also the site of an oil refinery owned by Western Refining. According to USA Today, in 1993 the truck stop and refinery were the only two establishments in the community.