The Coast Daylight, originally known as the Daylight Limited, was a passenger train on the Southern Pacific Railroad (SP) between Los Angeles and San Francisco, California, via SP's Coast Line. It was advertised as the "most beautiful passenger train in the world," carrying a particular red, orange, and black color scheme. The train operated from 1937 until 1974, being retained by Amtrak in 1971. Amtrak merged it with the Coast Starlight in 1974.

The Southern Pacific was an American Class I railroad network that existed from 1865 to 1996 and operated largely in the Western United States. The system was operated by various companies under the names Southern Pacific Railroad, Southern Pacific Company and Southern Pacific Transportation Company.