Siebel may refer to:

Companies

• Siebel, a German aircraft manufacturer founded in 1937 in Halle an der Saale
• Siebel Systems, a software company principally engaged in the design, development, marketing and support of customer relationship management (CRM) applications.

People

• Carl Siebel (1836–1868), German merchant and poet
• Fritz Siebel (1913–1991), Austrian American illustrator
• Jennifer Siebel Newsom (born 1974), American documentary filmmaker and First Lady of California since 2019
• Pablo Siebel (born 1954), Chilean painter
• Paul Siebel (born 1937), American singer-songwriter and guitarist
• Theodor Siebel (1897–1975), German politician
• Thomas Siebel (born 1952), American business executive
• Tillmann Siebel (1804–1875), German revival preacher in the Siegerland
• Wigand Siebel (1929–2014), German sociologist
• A character in the opera Faust

Siebels may refer to:

• George G. Siebels, Jr. (1913–2000), first Republican Mayor of Birmingham, Alabama
• Jon Siebels, (born 1979), guitarist in the band Eve 6
• Paul Siebels (born 1912), Belgian rower

This disambiguation page lists articles associated with the title Siebel.
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