Otwock County (Polish: powiat otwocki) is a unit of territorial administration and local government (powiat) in Masovian Voivodeship, east-central Poland.

It came into being on January 1, 1999, as a result of the Polish local government reforms passed in 1998.

Its administrative seat and largest town is Otwock, which lies 22 kilometres (14 mi) south-east of Warsaw.

The county covers an area of 615.09 square kilometres (237.5 sq mi).

The county is subdivided into eight gminas (two urban, one urban-rural and five rural).