Frontier Counties, 2007 Hawaii and Alaska not to scale Frontier Status* (# of counties) Frontier, Metropolitan (14) Frontier, Non-metropolitan (438) Not frontier (2590) *Frontier counties are defined as having fewer than seven persons per square mile. Source: Area Resource File, 2008: US Department of Health and Human Services, Health Resources and Services Administration. Prepared by: The North Carolina Rural Health Research and Policy Analysis Center, Cecil G. Sheps Center for Health Services Research, University of North Carolina at Chapel Hill.