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Urban vs. Rural Classifications by County (NCHS, RUCC, UI), ZIP Code (ZIP-RUCA, FAR), Census Tract (RUCA), and Block/Block Group (UA/UC) Classification Methods
NCHS= National Center for Health Statistics; RUCC=Rural-Urban Commuting Code; UI=Urban Influence Codes FAR= Frontier and Remote Area Codes; RUCA=Rural Urban Commuting Area; ZIP-RUCA= ZIP-code RUCA; UA/UC=Urbanized area/Urban cluster
