Kula Gulf is a waterway in the Western Province of the Solomon Islands. It lies between the islands of Kolombangara to the west, Arundel Island (Kohinggo) to the southwest, and New Georgia to the south and east. To the north, it opens into New Georgia Sound ("the Slot"). To the southwest, it connects via Blackett Strait to Vella Gulf and the Solomon Sea.
During the Solomon Islands campaign in World War II, two minor naval battles between the Imperial Japanese Navy and the United States Navy were fought here in July, 1943. The first was the Battle of Kula Gulf fought on the night of 5–6 July 1943. In that engagement, the cruiser USS Helena was sunk.
- Domagalski, John J. (2012). Sunk in Kula Gulf: The Final Voyage of the USS Helena and the Incredible Story of Her Survivors in World War II. Potomac Books Inc. ISBN 1597978396.
- Kilpatrick, C. W. (1987). Naval Night Battles of the Solomons. Exposition Press. ISBN 0-682-40333-4.
- McGee, William L. (2002). "Operation TOENAILS". The Solomons Campaigns, 1942-1943: From Guadalcanal to Bougainville--Pacific War Turning Point, Volume 2 (Amphibious Operations in the South Pacific in WWII). BMC Publications. ISBN 0-9701678-7-3.
- Morison, Samuel Eliot (1958). Breaking the Bismarcks Barrier, vol. 6 of History of United States Naval Operations in World War II. Castle Books. ISBN 0-7858-1307-1.