KOC

KOC is an abbreviation that can mean:
 * Kingdom of Croatia, a Medieval kingdom
 * Kings of Convenience, a Norwegian indie musical group
 * Knights of Columbus, a Roman Catholic fraternal order
 * Kodiak College, a college located in Kodiak, Alaska
 * Kuwait Oil Company, one of the biggest oil companies in the world
 * Korean Olympic Committee, represents South Korea in handling international affairs related to the Olympic Movement
 * "Knights of Cydonia", a song by the British band Muse
 * Kingdom of Comfort, a Delirious? album
 * Kingdoms of Camelot, an online game by Kabam
 * Kevin O'Connell, an American football coach and former player

In Chemistry:
 * Koc (Soil Organic Carbon-Water Partitioning Coefficient), the ratio of the adsorbed organic analyte to the dissolved