A sensing circuit and a display device including the same are disclosed. The sensing circuit includes: a first external power line connected to a pixel power line applying a pixel driving voltage to pixels; a second external power line connected to the pixel power line; a first selection switch element connected between the first external power line and a voltage source; a current sensor connected to the second external power line; and a second selection switch element connected between the current sensor and the voltage source, wherein the first selection switch element is turned on responsive to a first signal to supply the pixel driving voltage to the first external power line during an image display period, and the second selection switch element is turned on responsive to the second signal and the current sensor measures a current flowing through the second external power line during a sensing period.