Piezoelectric materials have wide applications in energy conversion, sensors, drives, and frequency control. This Research Topic of new piezoelectric materials and devices presents two reviews and eight original research articles that give insight into new piezoelectric materials, provide a basis for equivalent models of piezoelectric devices, and summarize and prospect the research of piezoelectric devices. Typical piezoelectric materials include bulk ceramics, thin films, single crystals, polymers, composites, etc., which are used for a variety of devices such as ultrasound transducers, sensors, and actuators. Piezoelectric materials and devices are fundamental to industrial and scientific applications such as non-destructive testing, acoustic tweezers, medical imaging, and ultrasound therapy.