Phillips Ranch is a master-planned community, first developed by Louis Lesser in 1965. It is located in the southwestern portion of the city limits of Pomona, in Los Angeles County, California. It is located near the Pomona Freeway (SR 60) and the Chino Valley Freeway (SR 71). The zip code serving the neighborhood is 91766. Phillips Ranch is 4 miles southwest of downtown Pomona, and is mostly working to upper-middle class. Many residents use "Phillips Ranch, CA" as a return address, which is an acceptable alternative to Pomona, CA, according to the United States Postal Service.