We invite you to explore more about our community. Please select a topic from the links provided below: Castaic Area History Castaic is rich in Southern California history, from Native American settlements to the hairpin curves of the historic Ridge Route through the Grapevine. Regions & Diversity From apartments to ranches, parks to pavement, Castaic has something for everyone. Find out more about our five community regions and how we come together as a whole. Community Standards District As Castaic grows, it's important to grow responsibly. The Castaic Community Standards District (CSD) establishes the official Castaic area of influence and describes the development standards for our community today and for future generations. Local Demographics Just who are we? Here are some statistical data and facts about our town.