Harlan is a fictional character in the science fiction series Stargate SG-1, and last android survivor of Altair. He was called annoying by Jack O'Neill, and was fond of saying com'traya, an Altair greeting of some sorts.

Harlan is a lunar crater near the southeastern limb of the Moon. It is located just to the northeast of Marinus crater. To the northeast is the flooded Abel walled plain, and to the southeast is Mare Australe.

Harlan is an international company that supplies animals and other services for experimentation. It is based in the United States, but has branches in the UK, France, Italy, Germany, Netherlands, Spain, Israel, Mexico, and Scandinavia.