Described is a system for inferring the location of users in online social media platforms using social network analysis. A social network is first extracted from data from at least one social media platform. A mapping is generated from each user to the user's estimated geographical location in the social network, resulting in an estimated location mapping. A mapping is generated from each user to the user's known geographical location, if known, resulting in a known location mapping. The estimated location mapping is updated to match the known location mapping. The location for each user j in the known location mapping is updated in a current estimated location mapping. The final geographical locations of users connected with j are estimated using a geometric median metric. Finally, the final estimated geographical locations of users connected with j are mapped into the social network.
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