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Urban area that extends into two or more countries (or dependent territories)
San Diego–Tijuana is an urban agglomeration across the Mexico–United States border .
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 [ edit ]
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[ 1] [ 2]
Goma –Gisenyi
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
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 [ 3]
Fergana and Kyzyl-Kiya
Uzbekistan – Kyrgyzstan
300,000
Qorasuv and Kara-Suu
40,000
Lahore and Amritsar
Pakistan – India
12,000,000
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
200,000
Main municipalities
Countries
Total population[citation needed ]
Øresund Region (Greater Copenhagen and Malmö )
Denmark – Sweden
3,964,522
Haparanda and Tornio
Sweden – Finland
32,000
Pello and Pello
4,500
Karesuando and Karesuvanto
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 )[ 4]
Italy – Switzerland
189,000[ 5]
Gorizia and Nova Gorica
Italy – Slovenia
Basel and Huningue and Weil am Rhein (Regio TriRhena )
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
700
Bourg-Madame and Puigcerdà
Hendaye and Irun
Lille and Roubaix and Tourcoing and Mouscron and Tournai and Kortrijk
France – Belgium
1,850,000
Longwy and Aubange and Pétange
France – Belgium – Luxembourg
80,000
Strasbourg and Kehl
France – Germany
700,000
Forbach and Saarbrücken
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
35,000
Frankfurt (Oder) and Słubice
75,000
Szczecin
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
Slavonski Brod and Brod
Croatia – Bosnia and Herzegovina
110,000
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
5,976,595
Buffalo -Niagara Region
1,614,790
Port Huron –Sarnia –Point Edward
105,776
Sault Ste. Marie –Sault Ste. Marie
93,944
San Diego–Tijuana
United States / Mexico
5,105,769[ 6]
Calexico–Mexicali
1,143,000
San Luis Río Colorado –San Luis
227,000
Nogales –Nogales
240,000
El Paso–Juárez
2,500,000[ 7]
Laredo–Nuevo Laredo
775,481[ 8]
Lower Rio Grande Valley
2,671,028[ 9]
Reynosa–McAllen
1,500,000[ 10]
Brownsville–Matamoros
1,387,985[ 11]
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
140,000
Chuí –Chuy
15,592[ 12] [ 13]
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
170,000
Tulcán –Ipiales
Ecuador / Colombia
190,000
Cúcuta –San Antonio del Táchira
Colombia / Venezuela
700,000 [ 14]