Family name Oktar (Oktar 
) , worldwide, is quite a common last name. The cognomen Oktar is characteristic of Turkey, where it is quite a rare surname, Belgium, where it is a rare surname, and Austria. Not in comparison with a country's population, it is commonest in Turkey, Indonesia, and Germany. Much less frequently, Oktar is the forename as well as the last name.
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| Oktar | Turkey, Germany, Indonesia, Belgium, United States |
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adnan oktar Turkish cult leader, TR (b. 1956) |
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| oktar durukan Turkish actor, TR (b. 1938) |
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| oktar cirit Turkish diplomat (1946–1976) (b. 1946) |
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| oktar ataman TR (b. 1939) |
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| oktar babuna Turkish physician, TR (b. 1962) |
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| levent oktar researcher (ORCID 0000-0002-3223-2418) |
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| süleyman oktar researcher |
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| oktar asoglu researcher (ORCID 0000-0002-9147-1654) |
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| faik n oktar |
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