Gelbart is a surname. Notable people with the surname include:

• Larry Gelbart (1928–2009), American comedy writer
• Michel Gelbart (1899–1966), American composer of Yiddish songs
• Michel Gelbart Head of Corporate Web Office at Reuters News Agency between 2000-2007
• Abe Gelbart (1911-1994), Israeli-American mathematician
• Stephen Gelbart (1946–) Israeli-American mathematician
• de:Eduard Gelbart (1878-1948), German composer

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