Phyllocnistis maxberryi is a moth of the family Gracillariidae. It is known only from Costa Rica. It has been found on altitudes between 1,950 and 3,100 m in the Heredia Province, the Central Conservation Area and the Cartago Province, Cerro de la Muerte, Villa Mills, in Cordillera de Talamanca.
The length of the forewings is 2.2-3.7 mm.
The larvae feed on Gaiadendron punctatum.