Manifold may refer to:

• Manifold, an abstract mathematical space which, in a close-up view, resembles the spaces described by Euclidean geometry.
• Manifold (automotive engineering), an engine part which joins many connections into one, for example the exhaust manifold
• Hydraulic manifold, a component used to regulate fluid flow in a hydraulic system, thus controlling the transfer of power between actuators and pumps
• Manifold (scuba), in a scuba set, connects two diving cylinders, allowing their contents to be accessed by either of two diving regulators.
• Manifold (magazine) and 2mainfold (magazine) are magazines of the Warwick University mathematical community.
• River Manifold, a river in England
• John Manifold, an Australian poet and critic.
• Manifold System, a company that develops a popular, low-cost GIS software package
• The Manifold Trilogy by science fiction author Steven Baxter.

Manifold