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 1741,34 km² and 658,224 inhabitants as of 2009. The largest cities are Jastrzębie-Zdrój from Polish side and Havířov from Czech side. It was established on 22 April 1998.^[1]

It comprises a large part of the historical region of Cieszyn Silesia:

• in Poland: 12 municipalities of the Cieszyn County, 2 municipalities of the Bielsko County (Jaworze and Jasienica), 1 municipality in Wodzisław County (Godów) and Jastrzębie-Zdrój (however, the last two are not part of Cieszyn Silesia).
• in the Czech Republic: 16 municipalities of the Karviná District and 27 municipalities in the eastern part of the Frýdek-Místek District;^[1][2]

Not the whole area of the historical Cieszyn Silesia region belongs to the euroregion, mainly Bielsko and Czechowice-Dziedzice and Frýdek with its surroundings, east of the Ostravice river, which belong to the Euroregion Beskydy.^[3]

• wide development of the region
• exchange of experience and information
• support for culture, education and sport in the region
• development of regional transport infrastructure
• improvement of the security of citizens
• tourism development
• cooperation between schools and support for ecological initiatives

• Olza (river)
• Czantoria Wielka
• Godów, Silesian Voivodeship