Systems, devices, and methods for access control via a mobile device are described herein. One device includes instructions stored thereon executable by a processor to receive location information associated with a mobile device in a facility, determine that the mobile device is within a particular distance of an area of the facility based on the location information, receive an indication of a user input by the mobile device, determine whether a user of the mobile device is allowed access to the area, and allow access to the area via a relay associated with the area responsive to a determination that the user is allowed access and the user input.