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 –Abadan –Basra
Iran – Iraq
2,000,000
Dhahran –Jubail –Manama
Saudi Arabia – Bahrain
2,000,000
Tashkent –Saryagash
Uzbekistan – Kazakhstan
3,000,000[ 3]
Fergana and Kyzyl-Kiya
Uzbekistan – Kyrgyzstan
300,000
Qorasuv and Kara-Suu
40,000
Heihe –Blagoveshchensk
China – Russia
400,000
Dandong –Sinuiju
China – North Korea
1,000,000
Greater Bay Area (Guangzhou –Dongguan –Shenzhen –Hong Kong –Macau
China – Hong Kong – Macau
71,200,000
Sijori Growth Triangle (Singapore –Johor Bahru –Batam –Bintan )
Singapore – Malaysia – Indonesia
9,000,000
Padang Besar and Padang Besar
Malaysia – Thailand
20,000
Vientiane –Nong Khai
Laos – Thailand
900,000
Al Ain and Al-Buraimi
United Arab Emirates – Oman
968,589
Savannakhet –Mukdahan
Laos – Thailand
200,000
Main municipalities
Countries
Total population[citation needed ]
Øresund Region (Greater Copenhagen and Malmö )
Denmark – Sweden
3,964,522
Haparanda –Tornio
Sweden – Finland
32,000
Pello (Pello, Övertorneå and Pello, Finland )
4,500
Karesuando –Karesuvanto
500
Imatra and Svetogorsk
Finland – Russia
45,000
Ivangorod –Narva
Russia – Estonia
69,000
Valga –Valka
Estonia – Latvia
20,000
Como –Chiasso (part of Greater Milan )[ 4]
Italy – Switzerland
189,000[ 5]
Gorizia –Nova Gorica
Italy – Slovenia
Basel –Huningue –Weil am Rhein (Trinational Eurodistrict of Basel )
Switzerland – France – Germany
2,400,000
Geneva –Annemasse –Ferney-Voltaire –Nyon (Grand Genève )
Switzerland – France
890,000
Kreuzlingen –Konstanz
Switzerland – Germany
110,000
Basque Eurocity Bayonne-San Sebastián
France – Spain
620,000
Le Perthus –Els Límits
700
Bourg-Madame –Puigcerdà
Hendaye –Irun
Lille –Roubaix –Tourcoing –Mouscron –Tournai –Kortrijk (Eurometropolis Lille–Kortrijk–Tournai )
France – Belgium
1,850,000
Longwy –Aubange –Pétange
France – Belgium – Luxembourg
80,000
Strasbourg –Kehl (Strasbourg-Ortenau Eurodistrict )
France – Germany
700,000
Forbach –Saarbrücken
700,000
Monaco –Beausoleil –Cap-d'Ail
Monaco – France
55,344
La Línea de la Concepción –Gibraltar
Spain – Gibraltar
95,628
Baarle (Baarle-Hertog –Baarle-Nassau )
Belgium – Netherlands
9,262
Görlitz –Zgorzelec
Germany – Poland
85,000
Guben –Gubin
35,000
Frankfurt (Oder) –Słubice
75,000
Szczecin
763,321
Cieszyn –Český Těšín
Poland – Czech Republic
57,000
Herzogenrath –Kerkrade
Germany – Netherlands
95,000
Freilassing –Salzburg
Germany – Austria
175,000
Vienna –Bratislava
Austria – Slovakia
2,400,000
Komárom –Komárno
Hungary – Slovakia
56,000
Rousse –Giurgiu
Bulgaria – Romania
250,000
Lifford –Strabane
Ireland – United Kingdom
18,500
Brod –Slavonski Brod
Bosnia and Herzegovina – Croatia
110,000
Zvornik –Mali Zvornik
Bosnia and Herzegovina – Serbia
70,000
Gradiška –Stara Gradiška
Bosnia and Herzegovina – Croatia
53,000
Novi Grad –Dvor
Bosnia and Herzegovina – Croatia
30,000
Dubica –Hrvatska Dubica
Bosnia and Herzegovina – Croatia
23,000
Kostajnica –Hrvatska Kostajnica
Bosnia and Herzegovina – Croatia
8,000
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]