Krishnaraja Wadiyar II (1728 – 25 April 1766[1]), was the eighteenth maharaja of the Kingdom of Mysore from 1734 to 1766.

He reigned under the control of dalvoy Devarajaiya Urs, who was in charge of Mysore from 1724 to 1746.

Krishnaraja Wadiyar had very little power as there was a tripartite struggle between himself, Hyder Ali, and sarvadhikari Nanja Raja.

Hyder Ali gradually filled the place of Nanja Raja.

Krishna Raja Wadiyar II died at Seringapatam on 25 April 1766.