Jarnołtowo [jarnɔu̯ˈtɔvɔ] (German: Groß-Arnsdorf) is a village in the administrative district of Gmina Małdyty, within Ostróda County, Warmian-Masurian Voivodeship, in northern Poland.

[1] It was established around 1308 and first mentioned in 1317 as Arnoldisdorff.

Between 1750-1754 Immanuel Kant, a philosopher, worked here as a tutor.

German philosopher Immanuel Kant worked as a tutor in Groß-Arnsdorf between 1750 and 1754.

This Ostróda County location article is a stub.