Abstract: The washable highchair slipcover is a one-piece, flexible cover made from washable material and designed to cover the seating area and supports of a highchair, particularly highchairs used by the general public in restaurants. The cover has a generally square-shaped central base that serves as the seat portion and is cushioned to provide additional comfort for the occupant. Foldable front, rear, and side panels extend from the central base. The front panel is T-shaped having a crotch section and front flap. A plastic placemat for covering a highchair tray is connected to the front flap by snap fasteners. One or more straps connect to the front panel by snap fasteners and have mating patches of hook and loop fastening material for looping around and securing toys to the slipcover. A storage pocket is formed on the rear panel.