Jamestown is an unincorporated community and census-designated place located along Interstate 40 in McKinley County, New Mexico, United States.

[5] In 1987, Giant built the largest truck stop and retail facility in their chain one mile south from the refinery.

[8] The oil refinery changed ownership several times[9] and was slated to close by October 2020, as per its last owner, Marathon Petroleum.

[10] Jamestown is in west-central McKinley County, mainly on the south side of Interstate 40, while the refinery is to the north, outside the census-designated place.

According to the U.S. Census Bureau, the Jamestown CDP has an area of 2.73 square miles (7.07 km2), all land.