Aaron Lewis, (born April 13, 1972 in Rutland, Vermont), is the lead vocalist and rhythm guitarist of the rock group Staind as well as a Grammy nominated songwriter.

Lewis grew up, largely, in Longmeadow, Massachusetts. Lewis was, before Staind, in a band known as J-CAT with Tori Sands, Chris Ballini, and Staind bandmate Jon Wysocki. An album surfaced on the internet with nine of J-CAT's performances at Club Infinity in Springfield, Massachusetts. The performances were recorded while Dysfunction was being recorded. Two of Staind's popular singles—"Outside" and "It's Been Awhile"—were both originally performed by J-CAT with somewhat different lyrics.

Lewis is renowned for his songwriting skills and has been nominated for three Grammys. His hobbies include fishing, golf and riding his mini dirt bike. He has worked in landscaping, cleaned hotel rooms, and played solo acoustic sets in bars around Atlanta. He is married to Vanessa Lewis and has three daughters, Zoe Jane and Nyla Rae and Indie Shay. Aaron has two sisters Evyette and Rachel. He was featured on the song No Sex by Limp Bizkit on their sophomore album Significant Other. He was also featured on a remix for the song "Crawling" on Linkin Park's album Reanimation (the remix is titled "Krwlng" on the album), as well as Sevendust's album Animosity, in which he contributed vocals to the song "Follow" and on the songs "Bleed" and "Send In the Clowns" by the band Cold. He's also featured on Jimmie's Chicken Shack's song "Falling Out," the only single off their 2004 album re.present.

On November 4, 2006, Aaron performed at his old high school in Longmeadow and gave all the proceeds to the music department to fund the department's expenses to buy new equipment and supplies.