The present technology relates to an information processing apparatus, mobile terminal, information processing method, program, and information processing system that can make it possible to easily link information output by a certain device to information output by another device. An information processing apparatus according to one aspect of the present technology includes : a reception control unit for allowing receiving a content containing first address information specifying a source of provision of first information being information related to the content; an output control unit for allowing outputting the content; an acquisition unit for acquiring the first information from a server acting as the source of the provision of the first information based on the first address information; and a provision unit for providing, to a mobile terminal, second address information included in the first information, the second address information specifying a source of provision of second information being mobile terminal-specific information related to the content. The present technology can be applied to a device including a display.