San Marcos is in North San Diego County and is bordered by Escondido to the east, Encinitas to the southwest, Carlsbad to the west and Vista to the northwest. San Marcos is home to Palomar College, the flourishing California State University San Marcos, and a growing number of high-tech businesses. The San Marcos Unified School District is one of the largest in San Diego County and includes 19 schools with diverse educational programs. There is an older section of town with more established neighborhoods, as well as newer community developments.