Originally part of Los Angeles County, Orange County officially formed on August 1, 1889 , after voters chose Santa Ana as the county seat.
For decades, the economy was dominated by orange and walnut groves. Post-World War II, a massive boom in aerospace and electronics manufacturing replaced these orchards with suburban subdivisions.
The region's first residents were indigenous tribes, including the ancestors of the Juaneño and Gabrielino people, who lived off hunting and gathering.
Orange County May 2026
Originally part of Los Angeles County, Orange County officially formed on August 1, 1889 , after voters chose Santa Ana as the county seat.
For decades, the economy was dominated by orange and walnut groves. Post-World War II, a massive boom in aerospace and electronics manufacturing replaced these orchards with suburban subdivisions. Orange County
The region's first residents were indigenous tribes, including the ancestors of the Juaneño and Gabrielino people, who lived off hunting and gathering. Originally part of Los Angeles County, Orange County