Międzyrzecz County (Powiat międzyrzecki) is a unit of territorial administration and local government (powiat) in Lubusz Voivodeship, western 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 Międzyrzecz, which lies 48 km south-east of Gorzów Wielkopolski and 68 km north of Zielona Góra. The county also contains the towns of Skwierzyna, lying 19 km north of Międzyrzecz, and Trzciel, 25 km south-east of Międzyrzecz.
The county covers an area of 1387.61 km2. As of 2019 its total population is 57,851, out of which the population of Międzyrzecz is 17,994, that of Skwierzyna is 9,671, that of Trzciel is 2,391, and the rural population is 27,795.
Międzyrzecz County is bordered by Strzelce-Drezdenko County to the north, Międzychód County to the north-east, Nowy Tomyśl County to the east, Świebodzin County to the south, Sulęcin County to the west and Gorzów County to the north-west.
