The Roadmaster was an automobile built by the Buick division of General Motors. Buick first used the Roadmaster name between 1936 and 1958. In 1991, Buick again applied the Roadmaster name to its full-size rear-wheel drive sedan and station wagon models as a replacement for the Buick Estate.

The origins of the Roadmaster name date to 1936 when Buick renamed its entire model lineup to celebrate the engineering improvements and design advancements over their 1935 models. Buick's Series 40 model range became the Special, the Buick Century took the place of the Series 60 and the Series 90 - Buick's largest and most luxurious vehicles - became the Limited. Buick's Series 80 became the Roadmaster.

GM discontinued both the Roadmaster sedan and the Roadmaster Estate Wagon in 1996. This was blamed on the smaller but more expensive and luxurious Park Avenue growing in size; the Roadmaster trim levels never exceeded that of the smaller but still full-sized Buick LeSabre. Another reason was largely a response to the SUV craze, as the Arlington, Texas factory where RWD GM cars were built was converted to truck and SUV production. When discontinued, the Roadmaster Estate and the similar Chevrolet Caprice wagon brought up the end of the era of the full-size family station wagon, and an end to General Motors' production of rear-wheel drive, full-size cars.