Sigwart is a German surname. Notable people with the surname include:
Christoph von Sigwart, German philosopher and logician George Karl Ludwig Sigwart, German chemist and physician Jendrik Sigwart (born 1994), German singer known by the mononym Jendrik. He represented Germany in Eurovision Song Contest 2021 Ulrich Sigwart, cardiologist (for whom is named the Sigwart procedure)