West Halmahera Regency is a regency in North Maluku Province of Indonesia. The regency was created on 25 February 2003 from the western districts of the former North Maluku Regency, and is now bounded by North Halmahera Regency to the north and east, while to the south it borders both East Halmahera Regency and that portion of the city of Tidore on the mainland of Halmahera. It covers an area of 2,239.11 km2, and it had a population of 100,424 people at the 2010 Census and 132,349 at the 2020 Census; the official estimate as at mid 2024 was 139,764. The capital lies at Jailolo (town).