Siegbert is the given name of:

• Siegbert Alber (1936–2021), German politician
• Siegbert Droese (born 1969), German politician
• Siegbert Einstein (1889–1968), German-Jewish politician, factory worker, civil servant, lawyer and Holocaust survivor
• Siegbert Horn (1950–2016), East German slalom canoeist
• Siegbert Hummel (1908−2001), German Tibetologist and cultural historian
• Siegbert Salomon Prawer (1925–2012), professor of German language and literature
• Siegbert Rippe (born 1936), Uruguayan lawyer and jurist
• Siegbert Schmeisser (born 1957), East German cyclist
• Siegbert Tarrasch (1862−1934), German chess player
• Siggi B. Wilzig (1926−2003), American businessman and Holocaust survivor
• Siegbert Wirth (1929–1999), American soccer player