Glendo Reservoir is a reservoir located on the North Platte River in Platte County and Converse County in the U.S. State of Wyoming. The reservoir is formed by Glendo Dam. The earthfill dam is 2,096 feet (639 m) feet long and 190 feet (58 m) high and contains two hydroelectric turbines capable of generating 38 megawatts of power. The reservoir retains a maximum of 1,170,505 acre-feet (1.443797×10 m) of water used primarily for irrigation and flood control.

The reservoir is popular for water sports and fishing. It is located completely within Glendo State Park.

• List of largest reservoirs of Wyoming