Olecko County () is a unit of territorial administration and local government (powiat) in Warmian-Masurian Voivodeship, northern Poland. Its administrative seat and only town is Olecko, which lies east of the regional capital Olsztyn.
When powiats were re-introduced in the Polish local government reforms of 1999, the present Goà Âdap and Olecko Counties made up a single entity (called powiat olecko-goà Âdapski or Olecko-Goà Âdap County). This was divided into two in 2002.
The county covers an area of . As of 2024 its total population is 31,863, out of which the population of Olecko is 15,617 and the rural population is 16,246.
Olecko County is bordered by Goà Âdap County to the north, Suwaà Âki County to the east, Eà Âk County to the south and Già ¼ycko County to the west.
The county is subdivided into four gminas (one urban-rural and three rural). These are listed in the following table, in descending order of population.