Law Enforcement Agencies in Semiahmoo, WA WA › Whatcom County Agencies serving the city of Semiahmoo in WA. Agency Types in Semiahmoo Federal 2 agencies Municipal Police 1 agencies Port Of Entry 1 agencies All Agencies in Semiahmoo, WA Blaine Police Department Whatcom County Port of Entry Whatcom County US Border Patrol Whatcom County US Border Patrol Whatcom County
