Systems and methods for classifying Internet-of-Things (IoT) gateways using principal component analysis are described. In some embodiments, an Information Handling System (IHS) may be configured to: receive metadata from a plurality of IoT gateways in an IoT network, where the metadata describes hardware attributes of a given IoT gateway and hardware attributes of one or more IoT devices coupled the given IoT gateway, perform principal component analysis upon the metadata by performing an eigenvalue decomposition or a singular value decomposition of a matrix including the metadata, and classify the given IoT gateway based, at least in part, upon the principal component analysis.