An organic light emitting device and a display device, the organic light emitting device including an anode; a hole transport region on the anode; an emission layer provided on the hole transport region, the emission layer including a first host and a dopant; a first host layer on the emission layer, the first host layer including a second host; an electron transport region on the first host layer; and a cathode on the electron transport region, wherein the second host is represented by the following Formula 1: