Official agreements, memoranda of understanding and agendas of cooperation have been signed with regard to the document entitled "International cooperation priorities of the Wielkopolska Region" with the following regions:

 Nottinghamshire County (United Kingdom)

Västernorrland County (Sweden)

Västerbotten County (Sweden)

Federal State of Lower Saxony (Germany)

Federal State of Brandenburg (Germany)

Federal State of Hesse (Germany)

Kharkiv Oblast (Ukraine)

 Chernihiv Oblast (Ukraine)

The Turkestan Region (Kazakhstan)

Chungcheongnam-do Province (South Korea)

Hainaut Province (Belgium)

North Brabant Province (Netherlands)

Brittany Region (France)

Emilia-Romagna Region (Italy)

Huila Region (Angola)  

Marché Region (Italy)

State of Karnataka (India)

Paraná State (Brazil)

City of São Paulo (Brazil)

 Vukovar-Syrmia County (Croatia)