A processor-implemented method for providing application single sign on leveraging a virtual local area network identifier is provided. The method comprises an authentication server providing a client device access to a network via association with a virtual local area network and a credential. The method also comprises the device invoking an application hosted on an application server and the application server identifying a virtual local area network tag associated with the device. The method also comprises the application server sending a message to the authentication server requesting linkage of the tag with a user identification associated with the device. The method also comprises the authentication server linking the tag with the user identification associated with the device and sending a message to the application server containing the identification. The method also comprises the application server using the identification to authenticate the device with the application and the device receiving access.