sentences:  Roosevelt County comprises the Portales, NM Micropolitan Statistical Area, which is also included in the Clovis-Portales, NM Combined Statistical Area.According to the U.S. Census Bureau, the county has a total area of , of which is land and (0.3%) is water.As of the 2000 census, there were 18,018 people, 6,639 households, and 4,541 families living in the county.