Idledale is an unincorporated town, a post office, and a census-designated place (CDP) located in and governed by Jefferson County, Colorado, United States. The CDP is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area. The Idledale CDP has an area of 177 acres (0.717 km2), all land. Idledale is served by the Jefferson County Public Schools.
Idledale is located on the north side of Bear Creek. Colorado State Highway 74 passes through the community as it traverses Bear Creek Canyon; to the east, the highway is known as Bear Creek Canyon Scenic Mountain Drive and leads downstream 4 miles (6 km) to Morrison; to the west the highway leads up the canyon the same distance to Kittredge.
United States Postal Service sits along Black Creek Road. Grapevine Road serves as the other only major road in Idledale running north and south between State Highway 74 and Interstate 70.