Ivasyuk (alternative spelling Ivasiuk; uk|Івасюк), a family name of Ukrainian origin. It is derived from Ivas or Ivasyk (uk|Івась or uk|Івасик), the diminutive form of the Ukrainian name Ivan (uk|Іван), "John", and the suffix -yuk, denoting descent, especially in the Ukrainian Carpathian mountains area.
The surname may refer to the following notable people: