Holtville (formerly, Holton) is a city in Imperial County, California, United States. Holtville is located 10.5 miles (17 km) east of El Centro, The population was 5,612 at the 2000 census. It is part of the 'El Centro, California Metropolitan Statistical Area'. City officials believed the population doubled in the last 6 years by 2007. Holtville was famous in the 20th century with having the Imperial Valley Carrot Festival but was confused with the Coachella Valley from Bugs Bunny animated shorts in the 1940s when he reads the map seeking a Carrot Festival.