Siegert () is a German surname derived from the given name Sieghart. Notable people with the name include:
Andrew Siegert (born 1982), Australian footballer Benjamin Siegert (born 1981), German footballer Bernhard Siegert (born 1959), German media theorist and media historian Daniel Siegert (born 1991), German singer Ferdinand Siegert (1865–1946), German paediatrician Hans Siegert (1914–1966), East German footballer and manager Herb Siegert (1924–2008), American footballer Herbert Siegert (1920–2008), German football manager Larry Siegert (1923–2007), Royal New Zealand Air Force officer Martin Siegert, British geographer Tobias Siegert (born 1991), German Grand Prix motorcycle racer
See also Bloch–Siegert shift