Big K

Big K may refer to:


 * Kuhn's-Big K, southeast American department store chain, sold out to Wal-Mart in 1981
 * A larger store format of Kmart
 * A store brand used by Kroger (and subsidiaries) for soft drinks
 * Big K (magazine), a national UK computer magazine in the 1980s
 * A nickname for the International Prototype of the Kilogram