Murai Sadakatsu (村井 貞勝?, 1528 - June 21, 1582) was a Japanese samurai of the Sengoku period through early Azuchi-Momoyama period, who served the Oda clan. He was active in the Oda clan's administration in Kyoto.
Sadakatsu died in 1582, during the Incident at Honnō-ji.
- De Bary, William T., and Yoshiko Dykstra. Sources of Japanese Tradition.