The Columbia Encyclopedia, Sixth Edition. 2001-07.
Calexico
(klk´sk) (KEY) , city (1990 pop. 18,633), Imperial co., S Calif., at the Mexican border; inc. 1908. A port of entry from adjacent Mexicali, Baja California, it is also a trade center for the southern part of the fertile Imperial Valley. Tourism is central to Calexicos economy; smuggling has long been a problem.