Okartowo [ɔkarˈtɔvɔ] (German : Eckersberg) is a village in the administrative district of Gmina Orzysz, within Pisz County, Warmian-Masurian Voivodeship, in northern Poland.

The Teutonic Order built a castle (a so-called Ordensburg) called Eckersburg here in c. 1340; it was subordinate to the castle of Balga.

Several battles were fought here and sometime around 1361 it was destroyed by Lithuanian troops under the command of Kęstutis.

The village grew up nearby the castle but suffered from history (it was pillaged by Tatars during the Deluge, occupied by Russian troops during the Seven Years' War and struck by the plague) and never developed beyond a small settlement.

[2] After World War II, it became part of Poland.