The Diocese of Bacolod is a Latin Church ecclesiastical territory or diocese of the Roman Catholic Church in Negros Occidental, Philippines. A suffragan of the Archdiocese of Jaro, its jurisdiction covers most of the northwestern towns and cities of the province of Negros Occidental namely, as far as Victorias City in the north and the Municipality of Hinigaran in the south.

Negros Occidental, officially the Province of Negros Occidental (Hiligaynon: Kapuoran sang Nakatungdang Negros (Negros Occidental; Tagalog: Lalawigan ng Kanlurang Negros, is a province in the Philippines located in the Western Visayas region. Its capital is the city of Bacolod, of which it is geographically situated and grouped under by the Philippine Statistics Authority, but remains politically independent from the provincial government. It occupies the northwestern half of the large island of Negros, and borders Negros Oriental, which comprises the southeastern half. Known as the "Sugarbowl of the Philippines", Negros Occidental produces more than half the nation's sugar output.