Cassia County Joint School District 151 is the 13th largest district in the state, in terms of student enrollment. The district encompasses most of Cassia County plus small portions of Oneida and Twin Falls Counties and is geographically larger than the state of Delaware. Within these 2,500 square miles are 18 schools with a total enrollment of 5,600 students. All schools are on a semester schedule and are accredited through the Northwest Accreditation Association and/or the State Department of Education. The district employs certified staff of over 340, 1/3 of whom have advanced degrees. Ancillary and auxiliary personnel bring the total number of employees to about 800 making the district the largest employer in the county.