Sovereign states
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- List of castles in Albania
- List of castles in Andorra
- List of castles in Armenia
- List of castles in Austria
- List of castles and fortresses in Azerbaijan
- List of castles in Belarus
- List of castles in Belgium
- List of castles in Bosnia and Herzegovina
- List of castles in Bulgaria
- List of castles in Croatia
- List of castles in Cyprus
- List of castles in Czech Republic
- List of castles and palaces in Denmark
- List of castles in Estonia
- List of castles in Finland
- List of castles in France
- List of castles in Georgia
- List of castles in Germany
- List of castles in Greece
- List of castles in Hungary
- List of castles in Iceland
- List of castles in the Republic of Ireland
- List of castles in Italy
- List of castles in Latvia
- List of castles in Liechtenstein
- List of castles in Lithuania
- List of castles in Luxembourg
- List of castles in Malta
- List of castles in Moldova
- List of castles in Monaco
- List of castles in Montenegro
- List of castles in the Netherlands
- List of castles in North Macedonia
- List of castles in Norway
- List of castles in Poland
- List of castles in Portugal
- List of castles in Romania
- List of castles in Russia
- List of castles in San Marino
- List of castles in Serbia
- List of castles in Slovakia
- List of castles in Slovenia
- List of castles in Spain
- List of castles in Sweden
- List of castles and fortresses in Switzerland
- List of castles in Turkey
- List of castles in Ukraine
- Castles in the United Kingdom