Smart Materials are able to respond to changes in their environment in a predetermined way, and research in the field of functional materials is often motivated by potential applications. Smart polymers are especially of technological significance in view of the grand global challenges including energy generation and storage, sustainability, and healthcare. Being smart also involves the individual tailoring of properties and functions to specific purposes. Therefore, smart materials’ design requires an immensely broad approach. In this special issue, emphasis is given to responsive polymers, shape‐memory polymers, nano‐/micro‐sized polymeric objectives, and application‐driven materials. In addition, fabrication schemes of smart materials are considered.