Security-Widefield is a census-designated place (CDP) comprising the unincorporated communities of Security and Widefield located in, and governed by, El Paso County, Colorado, United States. The population of the Security-Widefield CDP was 38,639 at the United States Census 2020. The CDP is a part of the Colorado Springs, CO Metropolitan Statistical Area and the Front Range Urban Corridor. Both the Colorado Springs post office and the Fountain post office serve the area.