Photonics and optics are finally seeing widespread adoption and significant growth into new markets. Photonic devices are being applied to sensing, communications, and even quantum computing. High speed fiber optics and highly integrated subsystems are essential to the rollout of 5G systems. There has never been a better time for research, development, and training in photonics and Photonics North 2021 is essential for developing and promoting the ecosystem. This year Photonics North will be carried out on-line and will feature plenary talks, simultaneous technical sessions, flash poster presentations, technical product demos and many opportunities to 'chat' with your colleagues and meet new people, virtually!