Ieva Simonaityte or Ewa Simoneit (23 January 1897 – 27 August 1978) was a Lithuanian writer.
She represented the culture of Lithuania Minor and Klaipeda Region, territories of German East Prussia with large, but dwindling, Lithuanian population.
She received critical acclaim for her novel Aukštuju Šimoniu likimas (The Fate of Šimoniai from Aukštujai, 1935).