The Moray Firth (Gaelic: An Cuan Moireach) is a roughly triangular inlet (firth) of the North Sea, north and east of Inverness. The Moray Firth is effectively two firths, the Inner Moray Firth, which was traditionally known as the Firth of Inverness, and the Outer Moray Firth which is more open North Sea water. The name "Firth of Inverness" is rarely found on modern maps, but extended from the Beauly Firth in the west, to Chanonry Point in the east. A number of rivers flow into the Moray Firth, including the River Ness, the River Findhorn and the River Spey.

The Moray Firth is one of the most important places on the UK coast for observing dolphins? and whales?. The most common species are the Bottlenose Dolphin and the Harbour Porpoise. With occasional sightings of Common dolphin and Minke Whale. The Moray Firth Coast hosts some spectacular displays of dolphins. There are visitor centres at Spey Bay and North Kessock run by the Whale and Dolphin Conservation Society where dolphins and other wildlife can often be seen.

It is also an important oil field and fishing grounds. Much of the fishing industry focuses on scallops and Norway lobsters.

The Inner Moray Firth is a designated as a Special Protection Area for wildlife conservation purposes.