The Santa Clara County District Attorney's Office is the largest prosecuting agency in Northern California. The Office represents the law enforcement needs of Santa Clara County, also known as "Silicon Valley", which has a population exceeding 1,700,000 residents in fifteen cities, including San Jose and unincorporated areas. The District Attorney's Office handles over 45,000 cases a year. The Office has a staff of nearly 500 people, including attorneys, investigators, forensic analysts, paralegals, clerical workers and volunteers. The Santa Clara County District Attorney's Crime Laboratory analyzes thousands of evidence items each year.