Robinson Ranch - Trabuco Highlands is a small unincorporated community located in the foothills of the Saddleback Valley in southern Orange County, California, and lies partly within the Cleveland National Forest. Robinson Ranch is north of the town of Rancho Santa Margarita with numerous hiking and biking trails with highly rated public and private schools nearby.

The following developments are in Robinson Ranch: Trabuco Crossings, Trabuco Ridge, Trabuco Springs, Trabuco Elms,Homestead, Fieldstone, The Meadows, Lyon Estates, Lyon Highlands and Promontory. Plano Trabuco Road leads from the top of the canyon south to Rancho Santa Margarita.