Abstract: An evaporative cooler cover having a three layer body internally dimensioned and configured to equal the external dimensions of at least one common model of evaporative cooler. A drawstring may provide a superior fit to the evaporative cooler device. The evaporative cooler cover may advantageously have a triple layer construction of a middle layer of nylon scrim or another loose fabric having two layers attached thereto: interior and exterior layers of solid vinyl or another polymer. The evaporative cooler cover of the invention may further be configured in either a generally cubical shape having an open bottom side or a generally cylindrical shape having an open bottom end.