Dear Colleagues,

This special issue is dedicated to exploring the multifaceted world of polymer materials designed with 3D printing. It covers a variety of innovative research, from the synthesis of novel polymers with customized properties to the design of complex 3D printed structures. The compendium highlights breakthroughs in materials science in addressing complex requirements such as printability, mechanical stability, biomimetic function, thermal stability, and biocompatibility, in addition, it highlights environmental considerations and sustainable practices that drive the production of 3d printed polymers. This special issue serves as a platform for academic and industrial collaboration to advance the field of polymer 3D printing and inspire the next generation of materials and applications.