Methods and apparatus for multiple user uplink are provided. In one aspect, a method includes receiving, at an access point, ranging information from a plurality of wireless devices. The method further includes determining a timing adjustment, for each of the plurality of wireless devices, based on the ranging information. The method further includes transmitting a timing adjustment message to each wireless device, the timing adjustment message indicating the timing adjustment. The method further includes transmitting a scheduling message instructing the plurality of wireless devices to transmit uplink data at a first reference time corrected by the timing adjustment.