Family name Castberg (Castberg 
) , worldwide, is a rare cognomen. The last name Castberg is characteristic of Norway, where it is quite a rare surname, Denmark, where it is a rare surname, and the United States, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Castberg | Denmark, Canada, Norway, Chile, United States |
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peter atke castberg Danish professor (1779–1823), NO (b. 1779) |
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| peter hersleb harboe castberg Norwegian politician (1794-1858), NO (b. 1794) |
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johan castberg Norwegian politician (1862-1926), NO (b. 1862) |
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| tycho frederik edvard castberg Norwegian physician (1818–1847) (b. 1818) |
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| johan christian tandberg castberg Norwegian politician (1827–1899), NO (b. 1827) |
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| christopher castberg Norwegian whaler (1833–1900), NO (b. 1833) |
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frede castberg Norwegian jurist, NO (b. 1893) |
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| peter harboe castberg Norwegian banker (b. 1844) |
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| oscar ambrosius castberg Norwegian artist (1846-1917), NO (b. 1846) |
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tycho castberg Norwegian architect, NO (b. 1900) |
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johan christian castberg Norwegian illustrator, painter and musician (1911-1988), NO (b. 1911) |
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| torgrim castberg Norwegian musician, NO (b. 1874) |
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| leif castberg Norwegian lawyer and politician (b. 1876) |
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| francis arthur harboe castberg (b. 1889) |
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| knut støren castberg (b. 1912) |
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Mr, Katja, Peter, David, Dorte, Laura, Layze, James, Johan, Tonje, Chris, Tycho, Elmer, Helle, Heidi, Frida, Anders, Austen, Krista, Jannie, Joakim, Elise, Audun, Amber, Anita, Ms, Siw, Bue, Ida, Mark, Matt, Stig, Sven, Anna, Anne, Adam, Aase, Curt, Paul, Dawn, Lisa, John, Joan, Eric, Erin, Marin, Jeanne, and Thomas