Silvisaurus (meaning "Woodland Lizard") is a genus of nodosaurid from Middle Cretaceous of Kansas. It was discovered in 1960, and had an estimated weight of 1 ton. The holotype was discovered by Warren Condray, and it was recovered by T. H. Eaton. It was 4 metres (13 feet) long and 1.6 metres (about 5 feet) tall. The type species is S. condrayi.