| Common Name: | New East Prussia |
| Conventional Long Name: | Province of New East Prussia |
| Subdivision: | Province |
| Nation: | Kingdom of Prussia |
| Event Start: | Third Partition |
| Year Start: | 1795 |
| Date Start: | 24 October |
| Event End: | Treaty of Tilsit |
| Year End: | 1807 |
| Date End: | 9 July |
| P1: | Masovian Voivodeship (1526–1795) |
| P2: | Podlaskie Voivodeship (1513–1795) |
| P3: | Trakai Voivodeship |
| S1: | Duchy of Warsaw |
| Flag S1: | Grand Coat of Arms of Duchy of Warsaw.svg |
| S2: | Russian Empire |
| Flag S2: | Flag of Russia.svg |
| Image Map Caption: | New East Prussia in 1806 |
| Capital: | Białystok[1] |
| Stat Area1: | 55000 |
| Stat Pop1: | 914610 |
| Stat Year1: | 1806 |
| Political Subdiv: | Bialystok Plozk |
| Today: | Poland Lithuania Belarus¹ |
| Footnotes: | ¹ Sopoćkinie area |
New East Prussia (German: Neuostpreußen; Polish: Prusy Nowowschodnie; Lithuanian: Naujieji Rytprūsiai) was a province of the Kingdom of Prussia from 1795 to 1807. It was created out of territory annexed in the Third Partition of the Polish–Lithuanian Commonwealth and included parts of Masovia, Podlaskie, Trakai voivodeship and Žemaitija. In 1806 it had 914,610 inhabitants with a territory of less than 55000km2, mainly Poles, Lithuanians, Jews and Belarusians.
New East Prussia encompassed territory between East Prussia and the Vistula, Bug, and Neman rivers.
Following Napoleon Bonaparte's victory in the War of the Fourth Coalition and the Greater Poland Uprising of 1806 the Province of New East Prussia was ceded according to the 1807 Treaties of Tilsit:
New East Prussia was divided into the German: Kammerdepartements of Bialystok and Płock which were divided into the following German: [[Districts of Prussia|Kreise]] (districts):
. Evgeny Finkel. Ordinary Jews: Choice and Survival during the Holocaust. Princeton University Press. 2017-02-21. 9781400884926 .