There are multiple artists with this name:

1) Johnny Woods (Looxahoma, Mississippi, November 1, 1917 – Olive Branch, Mississippi, February 1, 1990) was an American blues singer and harmonica player in the North Mississippi hill country blues style.

Woods was born in a small Mississippi town called Looxahoma, just west of Mississippi Highway 35. His harmonica playing first gained notoriety in the 1960s as a duet partner with fellow blues revival discovery guitarist/singer Mississippi Fred McDowell. They recorded together first for George Mitchell in 1967, for Chris Strachwitz's Arhoolie Records (King of the Country Blues V2), Swingmaster (Blues of Johnny Woods), and in 1972 for Tom Pomposello and Fred Seibert on Oblivion Records (Mississippi Harmonica). Stylistically, Woods' music sprang from the same North Mississippi Fife and drum blues band tradition as McDowell's. However, personal problems kept him rooted in the Delta, primarily working as a farmhand and sharecropper. After McDowell's death in July 1973, Woods faded away until George Mitchell paired him again with another late Mitchell Mississippi Delta discovery, R. L. Burnside, himself a McDowell disciple. Together they recorded the Swingmaster album and video, Going Down South. Johnny Woods died in Olive Branch, Mississippi in 1990.

2) Johnny Woods produces improvised analog synthesizer music from an off-grid Earthship high in the mountains of New Mexico