Avocado Heights is an unincorporated census-designated place in Los Angeles County, California, United States. It lies in the San Gabriel Valley, near Puente Hills. On the northern border lies the unincorporated community of West Puente Valley; on the eastern border the City of Industry. A thin strip of the City of Industry runs to the south, and the Pomona Freeway and the Puente Hills are further south. To the west is the San Gabriel River and the San Gabriel River Freeway, as well as the California Country Club. Avocado Heights is approximately 15 miles (24 km) from the downtown Los Angeles Civic Center. The population was 15,411 at the 2010 census, up from 15,148 at the 2000 census.

Avocado Heights is located at 34°2′19″N 118°0′16″W / 34.03861°N 118.00444°W / 34.03861; -118.00444 (34.038610, −118.004575), or about three miles (5 km) southeast of El Monte. According to the United States Census Bureau, the CDP has a total area of 2.8 square miles (7.3 km²). 2.7 square miles (7.0 km²) of it is land, and 0.1 square miles (0.26 km²) of it (4.77%) is water.

California (pronounced ⁱ/kælɨˈfɔrnjə/) is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third most extensive (after Alaska and Texas). It is home to the nation's second- and sixth-largest census statistical areas (Los Angeles Metropolitan Area and San Francisco Bay Area), and eight of the nation's fifty most populated cities (Los Angeles, San Diego, San Jose, San Francisco, Fresno, Sacramento, Long Beach and Oakland). The capital city is Sacramento.

California's diverse geography ranges from the Pacific Coast in the west, to the Sierra Nevada mountains in the east – from the Redwood–Douglas-fir forests of the northwest, to the Mojave Desert areas in the southeast. The center of the state is dominated by Central Valley, a major agricultural area. California contains both the highest and lowest points in the contiguous United States (Mount Whitney and Death Valley), and has the third-longest coastline of all states (after Alaska and Florida). Earthquakes are a common occurrence due to the state's location along the Pacific Ring of Fire: about 37,000 are recorded annually.