Last name Γιαννόπουλος (Giannopoulos 
, Γιαννόπουλος , Yannopoulos ) , throughout the world, is a common cognomen. The last name Γιαννόπουλος is habitual in Greece, where it is a common surname, Cyprus, where it is quite a common surname, and Australia, where it is quite a rare surname. Not in comparison with a country's population, this name is the most popular in Greece, the United States, and Australia.
| VARIANT | COUNTRY |
|---|---|
| Yiannopoulos, Yannopoulos, Giannopoulos | Cyprus, Canada, Australia, United States, Greece |
| Γιαννόπουλος | Greece |
| παναγιώτης γιαννόπουλος 18th century military person, GR (b. 1800) |
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αγησίλαος γιαννόπουλος Greek journalist, GR (b. 1852) |
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| εμμανουήλ γιαννόπουλος Greek economist and politician, GR (b. 1808) |
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περικλής γιαννόπουλος Greek poet, translator and essayist, GR (b. 1869) |
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| δημήτριος γιαννόπουλος Greek lawyer and politician (1887-1953), GR (b. 1887) |
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| ιωάννης γιαννόπουλος Greek politician and lawyer, GR (b. 1895) |
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| αλκιβιάδης γιαννόπουλος Greek writer, GR (b. 1896) |
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| αθανάσιος γ. γιαννόπουλος Greek politician, GR (b. 1899) |
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γιώργος γιαννόπουλος Greek actor, GR (b. 1960) |
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| ευάγγελος γιαννόπουλος Greek politician and lawyer (1918-2003), GR (b. 1918) |
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| ντίνος γιαννόπουλος musical artist, GR (b. 1919) |
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τάσος γιαννόπουλος Greek actor, GR (b. 1971) |
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| τάσος γιαννόπουλος Greek actor (1931-1977), GR (b. 1931) |
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| παναγιώτης α. γιαννόπουλος Greek university professor, GR (b. 1938) |
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| αθανάσιος γιαννόπουλος Greek physician, university professor and politician, GR (b. 1946) |
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