Copper oxide is any of several binary compounds composed of the elements copper and oxygen. Two oxides are well known, Cu<sub>2</sub>O and CuO, corresponding to the minerals cuprite and tenorite, respectively. Paramelaconite () is less well characterized.
Copper oxide may refer to:
- Copper(I) oxide (cuprous oxide, )
- Copper(II) oxide (cupric oxide, CuO)
- Copper peroxide (), a hypothetical compound
- Paramelaconite (copper(I,II) oxide, )
- Copper(III) oxide () does not exist although Cu(III) is a component of cuprate superconductors
- Copper(IV) oxide () has been proposed to exist in the gas phase