Lemon Henry "Blind Lemon" Jefferson (September 24, 1893 – December 19, 1929) was an American blues and gospel singer-songwriter and musician. He was one of the most popular and successful blues singers of the 1920s and has been called the "Father of the Texas Blues".

Due mainly to his high-pitched voice and the originality of his guitar playing, Jefferson's performances were distinctive. His recordings sold well, but he was not a strong influence on younger blues singers of his generation, who could not imitate him as easily as they could other commercially successful artists. Later blues and rock and roll musicians, however, did attempt to imitate both his songs and his musical style.

Jefferson had an intricate and fast style of guitar playing and a particularly high-pitched voice. He was a founder of the Texas blues sound and an important influence on other blues singers and guitarists, including Lead Belly and Lightnin' Hopkins.

He was the author of many songs covered by later musicians, including the classic "See That My Grave Is Kept Clean". Another of his songs, "Matchbox Blues", was recorded more than 30 years later by the Beatles, in a rockabilly version credited to Carl Perkins, who did not credit Jefferson on his 1955 recording. Fellow blues artist B.B. King credited Jefferson as one of his biggest musical influences, next to Lonnie Johnson, Louis Jordan and T-Bone Walker.