The Plymouth Valiant is an automobile which was marketed by the Plymouth division of the Chrysler Corporation in the United States from the model years of 1960 through 1976. It was created to give the company an entry in the compact car market emerging in the late 1950s. The Valiant was also built and marketed, without the Plymouth brand, worldwide in countries including Argentina, Australia, Brazil, Canada, Finland, Mexico, New Zealand, South Africa, Sweden and Switzerland, as well as other countries in South America and Western Europe. It became well known for its excellent durability and reliability, and was one of Chrysler's best-selling automobiles during the 1960s and 1970s, helping to keep the company solvent during an economic downturn.

Plymouth was a brand of automobiles produced by Chrysler Corporation and its successor DaimlerChrysler. The brand was launched in 1928 to compete in what was then described as the "low-priced" market segment that was dominated by Chevrolet and Ford. It became a high-volume seller for the automaker until the late 1990s. Plymouth cars were marketed primarily in the United States. The brand was withdrawn from the marketplace in 2001. The Plymouth models that were produced up to then were either discontinued or rebranded as Chrysler or Dodge.