Acton is an unincorporated census-designated place in Los Angeles County, California, near the Antelope Valley. According to the 2010 census, Acton had a population of 7,596. Acton is a small residential community located between the Sierra Pelona Mountains and the San Gabriel Mountains. It is off the Antelope Valley Freeway south of Pal…Acton is an unincorporated census-designated place in Los Angeles County, California, near the Antelope Valley. According to the 2010 census, Acton had a population of 7,596. Acton is a small residential community located between the Sierra Pelona Mountains and the San Gabriel Mountains. It is off the Antelope Valley Freeway south of Palmdale. Acton is roughly 20 miles northeast of the San Fernando Valley, and 47 miles north of downtown Los Angeles by highway. The town has a rural western theme which can be seen in its homes, commercial buildings and historical buildings, some of which date back to the late 1800s. The homes in the mountains around Acton have views of the valley below. In the valley are ranch style homes, often with equestrian facilities. While Acton is not a part of the Antelope Valley, it is grouped together with the Valley in the General Plan. Acton has a Metrolink commuter rail station on its border with Palmdale that is themed in an "old western" style and has been seen in various movies and commercials.