Leslie Johnson (June 20, 1933 – August 22, 2018), known as Lazy Lester, was an American blues musician who sang and played the harmonica and guitar. In a career spanning the 1950s to 2018, he pioneered swamp blues, and also played harmonica blues, rhythm and blues and Louisiana blues.

Best known for regional hits recorded with Ernie Young's Nashville-based Excello Records, Lester also contributed to songs recorded by other Excello artists, including Slim Harpo, Lightnin' Slim, and Katie Webster. Cover versions of his songs have been recorded by (among others) the Kinks, the Flamin' Groovies, Freddy Fender, Dwight Yoakam, Dave Edmunds, Raful Neal, Anson Funderburgh, and the Fabulous Thunderbirds. In the comeback stage of his career (since the late 1980s), he recorded new albums backed by Mike Buck, Sue Foley, Gene Taylor, Kenny Neal, Lucky Peterson, and Jimmie Vaughan.