Ophiophagus bungarus, the Sunda king cobra, is a species of king cobra that inhabits areas south of the Kra Isthmus or land bridge joining the Malay Peninsula with the rest of southeast Asia or Indochina.

The countries it is found in include southern Thailand (deep south), western Malaysia, Singapore and offshore islands, Sumatra, Borneo, Java, Bali, and some of the islands of the southern Philippines Archipelago.

Its dorsal scales range from brownish-yellow to mahogany, compared to the dark grey of O. kaalinga.

O. bungarus also differs in having a lower pterygoid tooth count of 11, compared to O. hannah with 18–21.

It may refer to the fact that, like kraits, it eats other snakes, or to their partially undivided subcaudals.