People who know this area well sometimes refer to Tustin as The City of the Trees. Although a variety of trees are responsible for this nickname, this is a distinctive quality of the area which dates back centuries, actually to the time of the early Spanish explorers.

Tustin is located in central Orange County and encompasses an area of 11.08 square miles. The City is bounded on the south by the  cities of Irvine and Santa Ana, on the north by the unincorporated portions of the County of Orange and the City of Orange, and on the east by unincorporated County territory and the City of Irvine.

The City continues to be a discernible entity, characterized physically by:

• The former Marine Corps Air Station Tustin, (closed in July 1999)
• Hillside areas which offer sweeping panoramic views of the Pacific Coast and Saddleback Mountains
• Its strategic crossroads location
• One of the oldest historical old towns in Orange County
• Prime commercial, industrial, and residential development