Ilin may refer to
*
Ilin Island in the Philippines
*
Ilin Island cloudrunner, a critically endangered cloud rat from Ilin Island
*
Ilyin Ilyin or Ilin (russian: Ильин) is a Russian masculine surname that is derived from the male given name Ilya and literally means ''Ilya's''. its feminine counterpart is Ilyina or Ilina. It may refer to
* Aleksandr Ilyin (disambiguation), sever ...
, a Russian surname
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