Warner is a census-designated place (CDP) in San Diego County, California. It is located in the southeastern part of the county, near the border with Riverside County. The population of Warner, according to the United States Census Bureau, was 1,049 as of the 2010 census.
Warner is a rural community with a mix of residential and agricultural land. It is located in the Valle de San Jose, a valley in the southern part of the county that is known for its citrus and avocado groves. The area is also home to a number of horse ranches. next Redlands
There are a few small businesses in Warner, including a post office, a small convenience store, and a few small restaurants and gas stations. The nearest larger towns are Temecula and Murrieta, which are both located about 20 miles to the northwest of Warner.