Last name Vacín (Vacín 
) , worldwide, is a very rare surname. The cognomen Vacín is habitual in Eastern Europe, particularly Czechia, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Vacín | Czechia |
| františek vacín Czech water polo player, CZ (b. 1893) |
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| miloš vacín fotbalista (1940-2020), CZ (b. 1940) |
|
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| josef vacín (b. 1934) |
|
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| otakar vacín (b. 1973) |
|
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| luděk vacín CZ (b. 1979) |
|