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    County of Imperial......



Imperial Valley a diverse and rich collection of Resources in the form  of Human Power, Infrastructure and Economic Development.

The climate is hot and dry, ranging from lows in the mid 30's in January to highs of 110+ in July and August (mean temperatures: low-55.0; high-89.6), with little moisture (average annual rainfall: 2.92 inches; 25 percent average relative humidity).


Imperial County extends over 4,597 square miles, bordering on Mexico to the south, Riverside County to the north, San Diego County on the west, and the State of Arizona on the east. The terrain varies from 235 feet below sea level at the Salton Sea to 4,548 feet at Blue Angel Peak.      

History and Facts

Imperial County, originally part of San Diego County, was founded August 7, 1907. The area was visited as early as 1540 by Hernando de Alarcon, discoverer of the Colorado River. It was further explored by Spanish explorers and Catholic friars. Settlements existed along the Butterfield Stage Route as early as 1858, but no real development took place until water was brought into the area in 1901.


The Official Site of the County of Imperial
940 Main Street
EL Centro, CA 92243


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Page Last Updated: 10/15/2014

2013 County of Imperial, California.