Magnis may refer to:

Magnis (Carvoran), the form of the name Magnae Carvetiorum (Carvoran) that appears in the Antonine Itinerary Magnis (Kenchester), the form of the name Magnae (Kenchester) that appears in the Antonine Itinerary Magnis Ridge, rock ridge in Antarctica Magnis Valley, ice-free valley in Antarctica

See also Magna (disambiguation) Magni (disambiguation)