California's 39th State Assembly district is one of 80 California State Assembly districts.

It is currently represented by Democrat Juan Carrillo of Palmdale.

The district represents heavily Hispanic portions of San Bernardino County and Los Angeles County.

The district takes in portions of Lancaster and Palmdale before stretching east across mostly uninhabited areas to take in half of the region known as the High Desert, including portions of Adelanto, Victorville, and Hesperia.

Due to redistricting, the 39th district has been moved around different parts of the state.