Family name Oláh (Oláh 
, Олах 
) , in the entire world, is quite a rare surname. The cognomen Oláh is characteristic of Eastern Europe, particularly Hungary, where it is quite a common surname, Slovakia, where it is quite a rare surname, and Czechia. Measured by absolute frequency, this name is the most popular in Eastern Europe, particularly Hungary, Slovakia, and Romania. Much less frequently, Oláh is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Oláh | Germany, Slovakia, Hungary, Czechia, Romania |
| Олах | Ukraine, Russia, Kazakhstan |
| mihály nánási oláh (b. 1760) |
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| oláh jános HU (b. 1793) |
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oláh gusztáv Hungarian physician, psychiatrist (1857–1944), HU (b. 1857) |
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| johann illucz oláh = Q23902918 (b. 1817) |
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| jános illucz oláh = Q94987261 (b. 1817) |
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| oláh lászló lawyer, HU (b. 1825) |
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| oláh károly (1826–1875) Hungarian journalist, HU (b. 1826) |
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oláh gábor poet, HU (b. 1881) |
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ferenc oláh Hungarian actor, RS (b. 1887) |
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oláh zoltán hungarian actor, HU (b. 1890) |
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| gyula oláh RO (b. 1836) |
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| oláh károly HU (b. 1841) |
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oláh gusztáv (1901-1956) opera director,, scenographer, HU (b. 1901) |
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| oláh miklós (1853–1910) Hungarian writer and teacher, HU (b. 1853) |
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| oláh károly (1857–1910), HU (b. 1857) |
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