Daniel Ronald "Ronny" Cox (born July 23, 1938) is an American character actor, singer/songwriter, and guitarist.

Cox, the third of five children, was born in Cloudcroft, New Mexico, the son of Lounette (née Rucker) and Bob P. Cox, a carpenter who also worked at a dairy. He grew up in Portales, New Mexico. Cox tours regularly with a band, performing at theatres and folk music festivals. On September 10, 1960, he married Mary Cox. She died in 2006; they had two children. He graduated from Eastern New Mexico University in 1963 with a double major in theater and speech correction.

As an actor, he is probably best known for his debut performance as Drew Ballinger in the acclaimed 1972 film Deliverance in which he plays the instrumental "Dueling Banjos" on his guitar with a mentally retarded banjo-playing mountain boy named Lonnie, played by child actor Billy Redden. Cox has also appeared as Lieutenant/Captain/Chief of Police Andrew Bogomil in Beverly Hills Cop and Beverly Hills Cop II, Richard "Dick" Jones in RoboCop, Mars Administrator Vilos Cohaagen in Total Recall, and Senator/Vice-President Robert Kinsey in Stargate SG-1. Cox also portrayed John Ramsey in the 2000 TV movie Perfect Murder, Perfect Town.