White Signal is a census-designated place in Grant County, New Mexico, United States. As of the 2020 census, White Signal had a population of 191. New Mexico State Road 90 passes through the community.
White Signal was named for a nearby outcropping of reflective white quartz; early residents thought the reflected sunlight resembled a signal. The community had a post office from 1909 to 1933.
According to the U.S. Census Bureau, the community has an area of ; of its area is land and is water.
According to the Köppen Climate Classification system, White Signal has a cold semi-arid climate, abbreviated "BSk" on climate maps. The hottest temperature recorded in White Signal was on June 20, 1960, while the coldest temperature recorded was on January 11, 1962.