This is a list of "twin towns" or "sister cities" — that is, pairs of towns or cities in different countries which have town twinning

Town twinning

Twin towns and sister cities are two of many terms used to describe the cooperative agreements between towns, cities, and even counties in geographically and politically distinct areas to promote cultural and commercial ties.- Terminology :...

 arrangements. Where known, the date of formation of the twinning agreement is included in parentheses.

Note that the list is likely to always remain incomplete, since no canonical list of such arrangements exists; even those towns that are listed may well have arrangements which are not listed here.
However, a searchable, interactive list is to be posted by Sister Cities International

Sister Cities International

Sister Cities International is a nonprofit citizen diplomacy network that creates and strengthens partnerships between United States and international communities. More than 2,000 cities, states and counties are partnered in 136 countries around the world...

. Note also that any twinning arrangement should be listed at two locations in the list: once for each of the towns involved in the arrangement.

Due to the extreme size of this list and for ease of navigation, the list is divided into several separate lists by continent, which are then organized by country, and in some cases (where there are a large number of twinnings to list) by an appropriate sub-division of the country (e.g. the UK is divided by ceremonial county

Ceremonial counties of England

The ceremonial counties are areas of England to which are appointed a Lord Lieutenant, and are defined by the government as counties and areas for the purposes of the Lieutenancies Act 1997 with reference to the metropolitan and non-metropolitan counties of England and Lieutenancies Act 1997...

). Lists for some countries have in turn been moved to separate lists, which are linked individually below.

Africa

• List of twin towns and sister cities in Africa
  • List of sister cities in Egypt

Americas

• List of twin towns and sister cities in the Caribbean
• List of twin towns and sister cities in Central America
• List of twin towns and sister cities in North America
  • List of sister cities in Canada
  • List of sister cities in the United States
  • List of twin towns and sister cities in Mexico
• List of twin towns and sister cities in South America
  • List of twin towns and sister cities in Argentina
  • List of twin towns and sister cities in Brazil
  • List of twin towns and sister cities in Paraguay

Asia

• List of twin towns and sister cities in Asia
  • List of twin towns and sister cities in China
  • List of twin towns and sister cities in India
  • List of twin towns and sister cities in Israel
  • List of twin towns and sister cities in Iran
  • List of twin towns and sister cities in Japan
  • List of twin towns and sister cities in Jordan
  • List of twin towns and sister cities in Indonesia
  • List of twin towns and sister cities in Kazakhstan
  • List of twin towns and sister cities in Lebanon
  • List of twin towns and sister cities in Pakistan
  • List of twin towns and sister cities in Palestine
  • List of twin towns and sister cities in Russia
  • List of twin towns and sister cities in South Korea
  • List of twin towns and sister cities in Taiwan
  • List of twin towns and sister cities in Turkey

Europe

• List of twin towns and sister cities in Europe
  • List of twin towns and sister cities in Austria
  • List of twin towns and sister cities in Belarus
  • List of twin towns and sister cities in Belgium
  • List of twin towns and sister cities in Bosnia and Herzegovina
  • List of twin towns and sister cities in Bulgaria
  • List of twin towns and sister cities in Croatia
  • List of twin towns and sister cities in the Czech Republic
  • List of twin towns and sister cities in Denmark
  • List of twin towns and sister cities in Estonia
  • List of twin towns and sister cities in Finland
  • List of twin towns and sister cities in France
  • List of twin towns and sister cities in Georgia
  • List of twin towns and sister cities in Germany
  • List of twin towns and sister cities in Greece
  • List of twin towns and sister cities in Hungary
  • List of twin towns and sister cities in Iceland
  • List of twin towns and sister cities in the Republic of Ireland
  • List of twin towns and sister cities in Italy
  • List of twin towns and sister cities in Kazakhstan
  • List of twin towns and sister cities in Latvia
  • List of twin towns and sister cities in Lithuania
  • List of twin towns and sister cities in Macedonia
  • List of twin towns and sister cities in Moldova
  • List of twin towns and sister cities in Montenegro
  • List of twin towns and sister cities in The Netherlands
  • List of twin towns and sister cities in Norway
  • List of twin towns and sister cities in Poland
  • List of twin towns and sister cities in Portugal
  • List of twin towns and sister cities in Romania
  • List of twin towns and sister cities in Russia
  • List of twin towns and sister cities in Serbia
  • List of twin towns and sister cities in Slovakia
  • List of twin towns and sister cities in Slovenia
  • List of twin towns and sister cities in Spain
  • List of twin towns and sister cities in Sweden
  • List of twin towns and sister cities in Switzerland
  • List of twin towns and sister cities in Turkey
  • List of twin towns and sister cities in Ukraine
  • List of twin towns and sister cities in the United Kingdom

Oceania

• List of twin towns and sister cities in Oceania