Family name Olaussen (Olaussen 
) , globally, is quite a rare surname. The cognomen Olaussen is habitual in Norway, where it is quite a common surname, Denmark, where it is a rare surname, and Slovakia.
| VARIANT | COUNTRY |
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| Olaussen | Slovakia, Denmark, Sweden, United States, Norway |
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eugène olaussen Norwegian politician, NO (b. 1887) |
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heming olaussen Norwegian politician (b. 1949) |
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| nanna olaussen Norwegian author (b. 1929) |
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| harry olaussen Canadian politician, CA (b. 1929) |
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iver olaussen Norwegian ski jumper |
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| trond einar olaussen Norwegian politician (b. 1969) |
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| håkon olaussen Norwegian journalist and priest (b. 1969) |
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| lars chr. olaussen (b. 1964) |
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| leif arne olaussen Norwegian musician (b. 1974) |
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| lars olav olaussen Norwegian handball player, NO (b. 1977) |
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| hilde olaussen Norwegian actress |
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| camilla olaussen researcher (ORCID 0000-0002-7316-2890) |
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| alexander olaussen researcher |
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| ken a olaussen researcher |
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| ken andré olaussen researcher |
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