Seibert is a surname of German origin. It comes from the German personal name Seibert, which was formed from Old High German sigu/Old Saxon *sigi, meaning victory, and Old High German beraht/Old Saxon berht, meaning bright. The "g" was dropped and the first vowel became a diphthong. There are 3495 people with this surname in Germany, mostly in the west of the country. Variants include Siegbert, Siebert, Siepert, Seiberth, Saibert and Zeiberts.^[1]

• Austin Seibert (born 1997), American football player
• Donald Seibert (1922–2003), American college football coach
• Earl Seibert (1910–1990), Canadian professional ice hockey player
• Florence B. Seibert (1897–1991), American biochemist
• Fred Seibert (born 1951), American television producer
• Kurt Seibert (born 1955), American baseball player
• Lloyd Seibert (1889–1972), American soldier; recipient of the Medal of Honor for action in World War I
• Margo Seibert (born 1984), American actress
• Mark Seibert (born 1960), American musician; composer of music for video games
• Michael Seibert (born 1960), American champion figure skater
• Oliver Seibert (1881–1944), Canadian ice hockey player
• Pete Seibert (1924–2002), American founder of Vail Ski Resort
• Robert Seibert (1941–2021), American professor of political science and political commentator
• Simon Seibert (1857–1917), New York politician
• Steffen Seibert (born 1960), German journalist and press secretary of the Chancellor's office

• All pages with titles containing Seibert
• Seibert Straughn, retired Barbadian sprinter