A method of aligning micro LEDs and a method of manufacturing a micro LED display using the same are provided. The method of aligning micro LEDs includes providing micro LEDs, each having a first surface that has a first maximum width and a second surface opposite to the first surface and has a second maximum width that is greater than the first maximum width, providing a transfer substrate including a transfer mold that has an array of openings, each of the openings being configured to accommodate the first surface of a corresponding micro LED and not accommodate the second surface of the corresponding micro LED and aligning the micro LEDs in one direction in the openings of the transfer mold by inserting the micro LEDs into the openings of the transfer mold so that the first surface of each of the micro LEDs is positioned within a corresponding opening.