Last name Iwanowska (Iwanowska 
, Ивановская 
) , around the world, is quite a common cognomen. The last name Iwanowska is characteristic of Eastern Europe, particularly Belarus, where it is quite a common surname, Russia, where it is quite a rare surname, and Poland. Also, Iwanowska is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Iwanowska | Poland, United Kingdom, Ireland, Germany, Italy |
| Ивановская | Kazakhstan, Belarus, Kyrgyzstan, Russia, Ukraine |
| sabina iwanowska Polish teacher, Righteous Among the Nations, PL (b. 1877) |
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| wilhelmina iwanowska Polish astronomer, PL (b. 1905) |
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| celina eugenia iwanowska PL (b. 1908) |
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| aleksandra iwanowska (b. 1954) |
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| teresa iwanowska |
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| ludwika iwanowska |
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| katarzyna iwanowska (b. 1999) |
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