Last name Kolarz (Kolarz 
) , throughout the world, is a rare family name. The cognomen Kolarz is habitual in Poland, where it is quite a rare surname, Austria, where it is a rare surname, and Czechia. Not in comparison with a country's population, the name is most common in Poland, Germany, and the United States. Also, Kolarz is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kolarz | Czechia, United States, Germany, Poland, Austria |
| antoni kolarz (b. 1883) |
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| walter kolarz British scholar, PL (b. 1912) |
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| teofil kolarz PL (b. 1919) |
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michael kolarz Czech ice hockey player, CZ (b. 1987) |
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| henry kolarz DE (b. 1927) |
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| leopold kolarz Czechoslovak architect, CZ (b. 1937) |
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| stefania kolarz |
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