Family name Üstündağ (Üstündağ 
) , across the world, is a common last name. The family name Üstündağ is characteristic of Turkey, where it is quite a common surname, and China, where it is an extremely rare surname.
| VARIANT | COUNTRY |
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| Üstündağ | China, United States, Germany, Turkey, France |
Uestuendag, and Ustundag
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muhittin üstündağ Turkish politician, GR (b. 1884) |
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| ekrem hayri üstündağ Turkish politician, TR (b. 1886) |
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mustafa üstündağ Turkish actor, TR (b. 1977) |
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| mustafa üstündağ Turkish politician, TR (b. 1933) |
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nida eliz üstündağ Turkish swimmer, TR (b. 1996) |
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| ekrem üstündağ TR (b. 1946) |
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| metin üstündağ Turkish caricaturist, TR (b. 1965) |
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| orhan üstündağ association football player, TR (b. 1967) |
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| taner üstündağ Turkish alpine skier (b. 1971) |
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| efe üstündağ Turkish tennis player (b. 1977) |
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| kasım üstündağ researcher (ORCID 0000-0002-4786-6165) |
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| zafer üstündağ researcher |
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| ahmet önder üstündağ Turkish academic, scientist and researcher (ORCID 0000-0002-4950-8927), TR |
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| aylin üstündağ researcher |
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| ecem özkaya üstündağ Turkish actress, TR (b. 1988) |
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