A pixel circuit and OLED display including the same are disclosed. In one aspect, the pixel circuit includes an OLED and a driving transistor including a drain electrode and a gate electrode electrically connected to a first node. The driving transistor is configured to supply a driving current to the OLED based on a voltage of the gate electrode; a storage capacitor electrically connected to the first node. A compensating transistor is electrically connected between the first node and the drain electrode of the driving transistor and configured to be controlled by a scan signal. A diode unit is electrically connected between the first node and the compensating transistor, and the compensating transistor is electrically connected to the first node via the diode unit.