Douglas Wayne Sahm (November 6, 1941 – November 18, 1999) was an American musician from Texas. Born in San Antonio, Texas, he was a child prodigy in country music but became a significant figure in roots rock and other genres. Sahm is considered one of the most important figures in what is identified as Tex-Mex music. He was the founder and leader of the 1960s rock and roll band, the Sir Douglas Quintet. He would later co-found the Texas Tornados with Augie Meyers, Freddy Fender, and Flaco Jiménez as well as Los Super Seven.

Sahm was proficient on multiple musical instruments and was a lifelong baseball fan.