An organic light emitting display device includes: a display panel including a red sub-pixel, a green sub-pixel, a first blue sub-pixel, and a second blue sub-pixel connected to scan lines and data lines; a scan driver configured to drive the plurality of scan lines; a data driver configured to output a data output signal in response to a data signal; a de-multiplexer circuit configured to sequentially provide the data output signal to a first data line, a second data line, a third data line, and a fourth data line, respectively to the red sub-pixel, the green sub-pixel, the first blue sub-pixel, and the second blue sub-pixel, in response to selection signals; and a timing controller configured to provide the data signal to the data driver, control the scan driver, and output the selection signals in response to an image signal and a control signal.