Srem is a town on the Warta river in central Poland. It has been situated in the Greater Poland Voivodeship since 1999; from 1975 to 1998 it was part of the Poznan Voivodeship. As of 1995, the population of Srem was 29,800.

Syrmia (; ) is a fertile region of the Pannonian Plain in Europe, between the Danube and Sava rivers. It is divided between Serbia in the east and Croatia in the west. Most of Syrmia is located in the Srem and South Backa districts of Serbia's Autonomous Province of Vojvodina. A smaller part of the region around Novi Beograd, Zemun, and Surcin belongs to the City of Belgrade. The westernmost part is in eastern Croatia in Vukovar-Srijem.