Węgorzewo County (Polish: powiat węgorzewski) is a unit of territorial administration and local government (powiat) in Warmian-Masurian Voivodeship, northern Poland, on the border with Russia.

It was created in 2002 out of the northern part of Giżycko County.

Its administrative seat and only town is Węgorzewo, which lies 95 kilometres (59 mi) north-east of the regional capital Olsztyn.

The county covers an area of 693.43 square kilometres (267.7 sq mi).

The county is subdivided into three gminas (one urban-rural and two rural).