Techniques are presented to optimize location classification accuracy for wireless devices. A controller in communication with one or more wireless access points receives measurement data associated with signals received at one or more wireless access points from a plurality of wireless clients. The controller classifies each of the measurement data associated with a corresponding client as indicative a location inside of a particular region or outside of the particular region. The controller determines information of an actual location for each of the clients and classifies the information of the actual location as indicating a location inside of the particular region or outside of the particular region. For a given client whose classification of the information of the actual location does not match the classification of the corresponding measurement data, the controller modifies the information of the actual location of the given client.