Bluefield is a city in Mercer County, West Virginia, United States. The population was 10,447 at the 2010 census. It is also the core city of the Bluefield WV-VA micropolitan area which has a population of 107,578. The micropolitan area is the 350th largest statistical population area and the thirty-third largest micropolitan area in the United States.
Bluefield is located at 37°15′44″N 81°13′7″W / 37.26222°N 81.21861°W / 37.26222; -81.21861 (37.262219, -81.218674).
According to the United States Census Bureau, the city has a total area of 8.7 square miles (22.6 km²), all of it land.