Reservoir (disambiguation)

A reservoir is an artificial lake.

Reservoir may also refer to:
 * A thermodynamic reservoir, an ideal thermodynamical system.
 * Reservoir, Victoria, a suburb of Melbourne, Victoria, Australia
 * Reservoir, Western Australia, a suburb of Perth, Western Australia, Australia
 * Reservoir, California, a former settlement in California, United States
 * Reservoir (Fanfarlo album), 2009
 * Reservoir (Gordi album), 2017
 * Reservoir (EP), 2003 EP by Fionn Regan
 * Reservoir station (MBTA), a streetcar stop on the Boston subway
 * Reservoir (Rauschenberg), a 1961 painting by Robert Rauschenberg
 * Natural reservoir, an alternative or passive host for a disease
 * Fomite, any inanimate object or substance capable of carrying infectious organisms
 * Petroleum reservoir, a subsurface pool of hydrocarbons