Waimea is a landlocked community in Hawaiʻi County, Hawaii, United States. Waimea is the center for ranching activities and paniolo culture. The name Waimea means reddish water. For statistical purposes, the United States Census Bureau has defined that community as a census-designated place (CDP). The population was 7,028 at the 2000 census and 9,212 at the 2010 census. Since each U.S. state cannot have more than one post office of the same name, and there is a post office in Waimea, Kauai County, the official U.S. Post Office designation for Waimea is Kamuela, although this name is only used by the post office, not by locals nor road signage.