The Keddie murders are an unsolved quadruple homicide that occurred over the night of April 11–12, 1981 in Keddie, California, United States. The victims were Glenna Susan "Sue" Sharp (née Davis; born March 29, 1945), daughter Tina Louise Sharp (born July 22, 1968), son John Steven Sharp (born November 16, 1965) and John's friend Dana Hall Wingate (born February 8, 1964).

The murders took place in house No. 28 of the Keddie Resort. The bodies of Wingate, Sue and John Sharp were found on the morning of April 12 by Sue's 14-year-old daughter Sheila, who had been sleeping at a friend's house. Sue's two younger sons, Rick and Greg, as well as their friend Justin Smartt, were also in the house but were unharmed. Tina was missing from the scene.