Willow Creek Dam (National ID # CO01670) is a dam in Grand County, Colorado.
The earthen dam was constructed between 1951 and 1953 by the United States Bureau of Reclamation, with a height of , and a length of at its crest. It impounds Willow Creek for irrigation water storage and hydroelectric power, part of the Bureau's larger Colorado-Big Thompson Project. The dam is owned by the Bureau and operated by the local Northern Colorado Water Conservancy District.
The reservoir it creates, Willow Creek Reservoir, has a normal water surface of , and has a maximum capacity of . Recreation includes camping and fishing (for brown trout, rainbow trout, and salmon).