Pitch is the name for any of a number of viscoelastic, solid polymers. Pitch can be made from petroleum products or plants. Petroleum-derived pitch is also called bitumen. Pitch produced from plants is also known as resin. Products made from plant resin are also known as rosin.

Pitch was traditionally used to help caulk the seams of wooden sailing vessels. Pitch was also used to waterproof wooden containers, and is sometimes still used in the making of torches.

Petroleum-derived pitch is black in color, hence the adjectival phrase, "pitch-black".