The 2023 International Topical Meeting on Microwave Photonics (MWP) will be held from 15th October to 18th October 2023 in Nanjing, China. Microwave photonics (MWP) is concerned with the use of photonic devices, systems, and techniques for applications in microwave, millimeter-wave, and THz wave engineering, and also encompasses the development of high-speed photonic components for microwave system applications. The field is continuing to experience significant growth, fuelled by the recent interest and development in integrated microwave photonics and microwave/millimeter-wave photonics for 5G applications and beyond.