Węgorzewo [vɛŋɡɔˈʐɛvɔ] (until 1946 Polish: Węgobork; German: Angerburg, Lithuanian: Ungura) is a tourist town on the Angrapa River in northeastern Poland, within the historical region of Masuria.

It is the seat of Węgorzewo County in the Warmian-Masurian Voivodeship and is located not far from the border with Russia's Kaliningrad Oblast.

The town was first mentioned in a 1335 chronicle as Angirburg, or "eel castle", a settlement of the Teutonic Knights with a block house, a palisade, and a watchtower.

A 1341 document reported that the Teutonic Order had bestowed land on the river Angerapp (Angrapa) upon twelve Old Prussians for their loyal service.

[1] The completion of the stone castle Angerburg allowed the Teutonic Knights to increase development of the surrounding countryside.

In 1454, the region was incorporated by King Casimir IV Jagiellon to the Kingdom of Poland upon the request of the anti-Teutonic Prussian Confederation.

The town suffered from the Swedish-Polish Wars, attacks by the Tatars, and plague epidemics, the last outbreak of which occurred in 1710 and claimed 1,111 victims.

[5] Polish secret resistance was active and smuggled weapons through the town to the Russian Partition of Poland during the January Uprising.

[10] The canalization of the Angerapp and the expansion of the harbor in 1856 allowed business to expand, and the garrison left the town in 1858.

Unlike the neighboring town of Gołdap to the east, Angerburg was not involved in fighting, but was given up by the Wehrmacht as the Soviet Red Army advanced.

After the Red Army reached Elbing (Elbląg) and cut off East Prussia from the rest of Germany, the citizens of Angerburg were forced to evacuate the province by traveling across the Vistula Lagoon or to Pillau.

Węgorzewo initially suffered economically after the fall of the Iron Curtain and the Revolutions of 1989, but has become a popular tourist site in the Masurian Lake District.