Methods and apparatus for tracking antimicrobial resistance based on geography. An application server receives a query from a client application to provide antimicrobial resistance data for a geographic location. The application server determines a geographic region based, at least in part, on the geographic location included in the query, and antimicrobial data for samples collected from patients residing in the geographic region are retrieved from at least one health information datastore of a health information system. The retrieved antimicrobial data comprises information describing antimicrobial resistance of an infectious organism detected in the biological samples to at least one antimicrobial agent, and is transmitted to a client device on which the client application that issued the query is executing.