# Transborder agglomeration

A transborder agglomeration is an urban agglomeration or conurbation that extends into multiple sovereign states and/or dependent territories. It includes city-states that agglomerate with their neighbouring countries.

## List of transborder agglomerations
### Africa

| Main municipalities | Countries | Total population |
| Kinshasa–Brazzaville | Democratic Republic of the Congo / Republic of the Congo | 19,547,463 |
| Bukavu–Cyangugu | Democratic Republic of the Congo / Rwanda | 1,200,000 |
| Goma–Gisenyi | Democratic Republic of the Congo / Rwanda | 756,323 |
| Abidjan–Lagos | Côte d'Ivoire / Ghana / Togo / Benin / Nigeria | 27,000,000 |
| Lomé–Aflao | Togo / Ghana | 1,544,206 |
| N'Djamena–Kousséri | Chad / Cameroon | 1,694,819 |

### Asia

| Main municipalities | Countries | Total population |
| Astara and Astara | Iran– Azerbaijan | 100,000 |
| Khorramshahr and Abadan and Basra | Iran– Iraq | 2,000,000 |
| Dhahran and Jubail and Manama | Saudi Arabia– Bahrain | 2,000,000 |
| Tashkent and Saryagash | Uzbekistan– Kazakhstan | 3,000,000 |
| Fergana and Kyzyl-Kiya | Uzbekistan– Kyrgyzstan | 300,000 |
| Qorasuv and Kara-Suu | Uzbekistan– Kyrgyzstan | 40,000 |
| Heihe and Blagoveshchensk | China– Russia | 400,000 |
| Dandong and Sinuiju | China– North Korea | 1,000,000 |
| Greater Bay Area (Guangzhou and Dongguan and Shenzhen and Hong Kong– Macau | China– Hong Kong– Macau | 71,200,000 |
| Sijori Growth Triangle (Singapore and Johor Bahru and Batam and Bintan) | Singapore– Malaysia– Indonesia | 9,000,000 |
| Padang Besar and Padang Besar | Malaysia– Thailand | 20,000 |
| Vientiane and Nong Khai | Laos– Thailand | 900,000 |
| Savannakhet and Mukdahan | Laos– Thailand | 200,000 |

### Europe

| Main municipalities | Countries | Total population |
| Øresund Region (Greater Copenhagen and Malmö) | Denmark– Sweden | 3,964,522 |
| Haparanda and Tornio | Sweden– Finland | 32,000 |
| Pello and Pello | Sweden– Finland | 4,500 |
| Karesuando and Karesuvanto | Sweden– Finland | 500 |
| Imatra and Svetogorsk | Finland– Russia | 45,000 |
| Ivangorod and Narva | Russia– Estonia | 69,000 |
| Valga and Valka | Estonia– Latvia | 20,000 |
| Como and Chiasso (part of Greater Milan) | Italy– Switzerland | 189,000 |
| Gorizia and Nova Gorica | Italy– Slovenia | |
| Basel and Huningue and Weil am Rhein (Trinational Eurodistrict of Basel) | Switzerland– France– Germany | 2,400,000 |
| Geneva and Annemasse and Ferney-Voltaire and Nyon (Grand Genève) | Switzerland– France | 890,000 |
| Kreuzlingen and Konstanz | Switzerland– Germany | 110,000 |
| Basque Eurocity Bayonne-San Sebastián | France– Spain | 620,000 |
| Le Perthus and Els Límits | France– Spain | 700 |
| Bourg-Madame and Puigcerdà | France– Spain | |
| Hendaye and Irun | France– Spain | |
| Lille and Roubaix and Tourcoing and Mouscron and Tournai and Kortrijk (Eurometropolis Lille–Kortrijk–Tournai) | France– Belgium | 1,850,000 |
| Longwy and Aubange and Pétange | France– Belgium– Luxembourg | 80,000 |
| Strasbourg and Kehl (Strasbourg-Ortenau Eurodistrict) | France– Germany | 700,000 |
| Forbach and Saarbrücken | France– Germany | 700,000 |
| La Línea de la Concepción and Gibraltar | Spain– Gibraltar | 95,628 |
| Baarle-Hertog and Baarle-Nassau | Belgium– Netherlands | 9,262 |
| Görlitz and Zgorzelec | Germany– Poland | 85,000 |
| Guben and Gubin | Germany– Poland | 35,000 |
| Frankfurt (Oder) and Słubice | Germany– Poland | 75,000 |
| Szczecin | Germany– Poland | 763,321 |
| Herzogenrath and Kerkrade | Germany– Netherlands | 95,000 |
| Freilassing and Salzburg | Germany– Austria | 175,000 |
| Vienna and Bratislava | Austria– Slovakia | 1,900,000 |
| Komárom and Komárno | Hungary– Slovakia | 56,000 |
| Rousse and Giurgiu | Bulgaria– Romania | 250,000 |
| Lifford and Strabane | Ireland– United Kingdom | 18,500 |
| Brod and Slavonski Brod | Bosnia and Herzegovina– Croatia | 110,000 |
| Zvornik and Mali Zvornik | Bosnia and Herzegovina– Serbia | 70,000 |
| Gradiška and Stara Gradiška | Bosnia and Herzegovina– Croatia | 53,000 |
| Novi Grad and Dvor | Bosnia and Herzegovina– Croatia | 30,000 |
| Dubica and Hrvatska Dubica | Bosnia and Herzegovina– Croatia | 23,000 |
| Kostajnica and Hrvatska Kostajnica | Bosnia and Herzegovina– Croatia | 8,000 |

### North America

| Main municipalities | Countries | Total population |
| Paso Canoas | Costa Rica / Panama | 9,543 |
| Metro Vancouver–Fraser Valley–Bellingham-Whatcom County | United States / Canada | 3,350,000 |
| Detroit–Windsor | United States / Canada | 5,976,595 |
| Buffalo-Niagara Region | United States / Canada | 1,614,790 |
| Port Huron–Sarnia–Point Edward | United States / Canada | 105,776 |
| Sault Ste. Marie–Sault Ste. Marie | United States / Canada | 93,944 |
| San Diego–Tijuana | United States / Mexico | 5,105,769 |
| Calexico–Mexicali | United States / Mexico | 1,143,000 |
| San Luis Río Colorado–San Luis | United States / Mexico | 227,000 |
| Nogales–Nogales | United States / Mexico | 240,000 |
| El Paso–Juárez | United States / Mexico | 2,500,000 |
| Laredo–Nuevo Laredo | United States / Mexico | 775,481 |
| Lower Rio Grande Valley | United States / Mexico | 2,671,028 |
| Reynosa–McAllen | United States / Mexico | 1,500,000 |
| Brownsville–Matamoros | United States / Mexico | 1,387,985 |

### South America

| Main municipalities | Countries | Total population |
| Saint-Laurent-du-Maroni–Albina | French Guiana / Suriname | |
| Saint Georges–Oiapoque | French Guiana / Brazil | 32,000 |
| Quaraí–Artigas | Brazil / Uruguay | 67,000 |
| Santana do Livramento–Rivera | Brazil / Uruguay | 140,000 |
| Chuí–Chuy | Brazil / Uruguay | 15,592 |
| Corumbá–Puerto Suárez | Brazil / Bolivia | 124,000 |
| Tabatinga–Leticia–Santa Rosa | Brazil / Colombia / Peru | 107,000 |
| Ponta Porã–Pedro Juan Caballero | Brazil / Paraguay | 209,000 |
| Foz do Iguaçu–Ciudad del Este–Puerto Iguazu | Brazil / Paraguay / Argentina | 800,000 |
| Barracão–Dionísio Cerqueira–Bernardo de Irigoyen | Brazil / Argentina | 36,000 |
| Uruguaiana–Paso de los Libres | Brazil / Argentina | 170,000 |
| Tulcán–Ipiales | Ecuador / Colombia | 190,000 |
| Cúcuta–San Antonio del Táchira | Colombia / Venezuela | 700,000 |