Patrick Sebastian Dinu (born 12 June 2005) is a Romanian competitive swimmer specializing in sprint freestyle events. At the 2022 World Junior Championships, he won a gold medal in the 4×100-metre freestyle relay, a silver medal in the 4×100-metre mixed freestyle relay, and placed fifth in the final of the 100-metre freestyle. He is a gold medalist in the 4×100-metre freestyle relay at the European Junior Swimming Championships in 2022 and silver medalist in 2021, as well as a silver medalist in the 4×100-metre mixed freestyle relay and in 2022.