Buenos Aires
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| Country | City/Region |
|---|---|
| Armenia | Yerevan |
| Brazil | Brasília, since 2002. |
| Brazil | Porto Alegre |
| Brazil | Rio de Janeiro |
| Brazil | São Paulo |
| Canada | Ottawa |
| Chile | Santiago |
| China | Beijing, since 1993. |
| Colombia | Bogotá |
| Colombia | Medellín |
| Croatia | Zagreb |
| Czech Republic | Prague |
| Dominican Republic | Santo Domingo |
| Ecuador | Quito |
| France | Paris and Paris, Kentucky |
| France | Toulouse |
| Germany | Berlin, since 1994. |
| Israel | Jerusalem (cooperation agreement). |
| Israel | Tel Aviv, since 1976. |
| Italy | Basilicata (region) |
| Italy | Cagliari |
| Italy | Calabria (region) |
| Italy | Genoa |
| Italy | Lucca |
| Italy | Milan |
| Italy | Naples |
| Italy | Rome |
| Japan | Osaka |
| Lebanon | Beirut, since 2006 |
| Tunisia | Tunis |
| Netherlands | Rotterdam |
| Paraguay | Asunción |
| Peru | Lima |
| Poland | Warsaw |
| Portugal | Lisbon |
| Serbia | Belgrade |
| South Africa | Cape Town |
| South Korea | Seoul |
| Spain | Barcelona |
| Spain | Bilbao, Basque Country |
| Spain | Cádiz |
| Spain | Guadix |
| Spain | Madrid |
| Spain | Oviedo, since 1983. |
| Spain | Santiago de Compostela, Galicia |
| Spain | Seville, Andalusia |
| Spain | Vigo |
| Switzerland | Geneva |
| Turkey | Istanbul |
| United Kingdom | London |
| United States | Los Angeles, California, until 2011. |
| United States | Miami, Florida, since 1993. |
| United States | State of New Jersey |
| United States | State of Ohio |
| Uruguay | Montevideo |
Read more about this topic: List Of Twin Towns And Sister Cities In Argentina