Sumkar District is a district in the north of Madang Province in Papua New Guinea. It is one of the six administrative districts that make up the province. Sumkar is a district which is made up of Karkar Island and part of mainland NCR.

• Walter Topagal (21 January 2005). "Madang Provincial Economic Profile". Papua New Guinea Department of Mining. Archived from the original on 13 October 2007. Retrieved March 26, 2013.

4°39′07″S 145°58′37″E / 4.652°S 145.977°E / -4.652; 145.977