Little Dell Reservoir is a reservoir in eastern Salt Lake County, Utah, United States, about 13 miles east of Salt Lake City in the western Wasatch Mountains. It is located alongside Utah State Route 65, about 1 mile northeast of Interstate 80. Little Dell is an impoundment on Dell Creek, but it also stores water diverted from Parleys Creek located immediately downstream. The reservoir was constructed between 1987 and 1993 for drinking water supply and flood control as a joint venture between the U.S. Army Corps of Engineers, Metropolitan Water District of Salt Lake City and Salt Lake County.