A system comprising a computer-readable storage medium storing at least one program, and a computer-implemented method for responsive web page delivery based on network bandwidth. Upon initiation of a network communication session, a bandwidth of a network connection of the client device involved in the network communication session is determined. At least one initial display element to provide as part of a webpage for display on the client device is selected based on the bandwidth of the network connection. Instructions are then provided to the client device which cause the client device to display the at least one display element. In some embodiments, an updated bandwidth is subsequently determined and updated display elements are selected based on the updated bandwidth.