The Gillig Transit Coach School Bus is a series of buses that were produced by the American bus manufacturer Gillig from 1940 to 1982. Alongside its namesake usage as a yellow school bus, the Transit Coach also served as the basis of motorcoaches and other commercial-use vehicles. Marketed primarily to operators on or near the West Coast of the United States (California, Washington State, or Oregon), the Transit Coach competed nearly exclusively against the similar Crown Supercoach through much of its production.