Northwestern Province

Northwestern Province or Northwest Province or North-Western Province may refer to:
 * Northwest Region, Cameroon, Northwest Region since 2008
 * North-West Frontier Province (1901–55), Pakistan, Khyber Pakhtunkhwa since 2010
 * North West (South African province), established 1994
 * North Western Province, Sri Lanka, also known as Wayamba
 * North-Western Province, Zambia
 * North Western Province (Victoria), an electorate of the Victorian Legislative Council (Australia) from 1856 to 2006
 * Northwest Province (IMCRA region), an Australian marine biogeographic province
 * North-Western Provinces, an administrative region in British India which existed in one form or another from 1836 until 1902