Ełk County (Polish: powiat ełcki) is a unit of territorial administration and local government (powiat) in Warmian-Masurian Voivodeship, northern Poland. It was created on January 1, 1999 as a result of the Local Government Reorganization Act of 1998. Its administrative seat and only town is Ełk, which lies 123 kilometres (76 mi) east of the regional capital Olsztyn.
The county covers an area of 1,111.87 square kilometres (429.3 sq mi). As of 2006 its total population is 84,760, out of which the population of Ełk is 56,156 and the rural population is 28,604.