A system for relevant secondary-device content distribution based on associated internet protocol (IP) addressing, the system including: a computer processor; and a content engine executing on said computer processor and configured to: identify at least a portion of an internet protocol (IP) address associated with a computing device; build a household profile based at least on the demographic information associated with the IP address; determine that the computing device is a non-mobile television client; assign the non-mobile television client to the household profile; receive a set of content requests from a second computing device; assign, based on a proportion of the content requests exceeding the predefined threshold, the second computing device to the household profile; and provide relevant content for the second computing device and the non-mobile television client based on the demographic information.