The Cathedral of Christ the Light, also called Oakland Cathedral, is the cathedral of the Roman Catholic Diocese of Oakland in Oakland, California. It is the seat of the Bishop of Oakland. Christ the Light, the first cathedral built entirely in the 21st century, replaces the Cathedral of Saint Francis de Sales, irreparably damaged in the Loma Prieta earthquake of 1989.

The Cathedral of Christ the Light Complex, as a larger cathedral center, is composed of the cathedral church, the chancery office of the bishop's curia, a conference center, rectory (priests' residence), Order of Malta Northern California Health Clinic, and a mausoleum. The cathedral center also houses City Lights Cafe and the Cathedral Shop, as well as a public plaza and garden

HVAC systems operate via a combination of radiant heating, cooling, and underfloor ventilation (UFAD) in the main dome. This system also includes central, primary-only, variable flow chilled and hot water plants.