El Cajon sits in San Diego County, California, about 17 miles east of downtown San Diego, in the broad, foothill-enclosed valley that gives the city its name — El Cajón, Spanish for "the box." It is one of the largest cities in the county and functions as the commercial, civic, and transit hub of the East County region. Its population is about 100,000. The city's roots are agricultural. The valley's Spanish-era past gave way to ranching and then to a farming economy built on citrus, avocados, and poultry, before San Diego's post-war growth turned El Cajon into a major suburban center. It incorporated in 1912 and became a charter city in 2012, reflecting its scale and local autonomy. El Cajon's role as East County's anchor is visible in its downtown and its institutions. Downtown El Cajon clusters restaurants, shops, and civic spaces that host long-running community events. The Grossmont Union High School District, based in the city, serves about 16,500 students across eastern San Diego County, while Grossmont College adds a community-college presence. The city's economy is a mix of retail, services, healthcare, and education. Transportation sets El Cajon apart among San Diego suburbs. The El Cajon Transit Center is a major hub on the San Diego Trolley, served by the Green, Orange, and Copper lines, connecting the city to downtown San Diego, Mission Valley, and La Mesa. Interstate 8 runs through the city and continues east toward the mountains and deserts. El Cajon suits households seeking a diverse, well-connected East County community with rail access, established neighborhoods, and a more attainable cost of living than coastal San Diego.