It is one of the many communities of the Black Hills Indian Reservation. Imperial is located in the Imperial Valley, about 3.75 miles north of El Centro. The population of Imperial was 14,758 according to the 2010 census. Mexicans account for 74.8% of the population. The white population can't be correctly calculated. There are 4,751 housing units in Imperial. The average household size is 3.1 persons per housing unit. Elevation is -59 feet below sea level. Zip code is 92251. Below are several google earth photos of Imperial.