Various embodiments are directed to systems and methods for obtaining and analyzing mobile device user attribute data. In various embodiments, a central server is configured to generate inquiry data configured to cause a mobile device to request user input from a user of the mobile device and to compile user attribute data into response data to be provided to the central server. The central server may then transmit the inquiry data to an interface system configured to communicate the inquiry data to the one or more mobile devices. The central server may be additionally configured to receive the response data generated by the mobile devices, either directly from the mobile devices and/or from the interface system. The central server may then analyze the receive response data to determine a population density of mobile device users based on the response data.