Euroregion Cieszyn Silesia (Polish: Euroregion Śląsk Cieszyński, Czech: Euroregion Těšínské Slezsko) is one of the euroregions (transnational co-operation structures) between Poland and Czech Republic. It has area of about 1,400 km and more than 680,000 inhabitants. The largest cities are Jastrzębie Zdrój from Polish side and Havířov from Czech side. It comprises a large part of the historical region of Cieszyn Silesia (except for Bielsko, Frýdek and several villages in the western and eastern part of Cieszyn Silesia belonging to Euroregion Beskidy). However it contains Jastrzębie Zdrój and Gmina Godów, which are not part of Cieszyn Silesia. It has been established on 22 April 1998.
