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.

This list is incomplete; you can help by adding missing items. (August 2010)

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
Basra and Khorramshahr and Abadan	Iraq– Iran	2,000,000
Blagoveshchensk and Heihe	Russia– China	400,000
Dandong and Sinuiju	China– North Korea	1,000,000
Dhahran and Jubail and Manama	Saudi Arabia– Bahrain	2,000,000
Fergana and Kyzyl-Kiya	Uzbekistan– Kyrgyzstan	300,000
Sijori Growth Triangle Singapore and Johor Bahru and Batam and Bintan)	Singapore– Malaysia– Singapore– Indonesia	9,000,000
Greater Bay Area (Guangzhou and Dongguan and Shenzhen and Hong Kong– Macau	China– Hong Kong– Macau	71,200,000
Kara-Suu and Qorasuv	Kyrgyzstan– Uzbekistan	40,000
Lahore and Amritsar	Pakistan– India	12,000,000
Mukdahan and Savannakhet	Thailand– Laos	200,000
Padang Besar and Padang Besar	Malaysia– Thailand	20,000
Tashkent and Saryagash	Uzbekistan– Kazakhstan	3,000,000 [3]
Vientiane and Nong Khai	Laos– Thailand	900,000

Main municipalities	Countries	Total population[citation needed]
Øresund Region (Greater Copenhagen and Malmö)	Denmark– Sweden	3,964,522
Baarle-Hertog and Baarle-Nassau	Belgium– Netherlands	9,262
Basel and Huningue and Weil am Rhein (Regio TriRhena)	Switzerland– France– Germany	2,400,000
Bourg-Madame and Puigcerdà	France– Spain
Como and Chiasso (part of Greater Milan)[4]	Italy–  Switzerland	189,000[5]
Geneva and Annemasse and Ferney-Voltaire and Nyon (Grand Genève)	Switzerland– France	890,000
Gorizia and Nova Gorica	Italy– Slovenia
Görlitz and Zgorzelec	Germany– Poland	85,000
Guben and Gubin	Germany– Poland	35,000
Hendaye and Irun	France– Spain
Ivangorod and Narva	Russia– Estonia	69,000
Komárno and Komárom	Slovakia– Hungary	56,000
Le Perthus and Els Límits	France– Spain	700
Basque Eurocity Bayonne-San Sebastián	France– Spain	620,000
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
Konstanz and Kreuzlingen	Germany–  Switzerland	110,000
Kerkrade and Herzogenrath	Netherlands– Germany	95,000
Frankfurt (Oder) and Słubice	Germany– Poland	75,000
Haparanda and Tornio	Sweden / Finland	32,000
Pello and Pello		4,500
Karesuando and Karesuvanto		500
Imatra and Svetogorsk	Finland / Russia	45,000
Rousse and Giurgiu	Bulgaria / Romania	250,000
Lifford and Strabane	Ireland– United Kingdom	18,500
Saarbrücken and Forbach	Germany– France	700,000
Salzburg and Freilassing	Austria– Germany	175,000
Slavonski Brod and Brod	Croatia– Bosnia and Herzegovina	110,000
Szczecin	Poland– Germany	763,321
Valka and Valga	Latvia– Estonia	20,000
Vienna and Bratislava	Austria– Slovakia	1,900,000
La Línea de la Concepción and Gibraltar	Spain– Gibraltar	95,628

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
Santana do Livramento–Rivera	Brazil /  Uruguay	140,000
Chuí–Chuy		15,592[12][13]
Corumbá–Puerto Suárez	Brazil /  Bolivia	124,000
Leticia–Tabatinga–Santa Rosa	Colombia–Brazil–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
Bernardo de Irigoyen–Barracão–Dionísio Cerqueira	Argentina / Brazil	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]

• Border town
• Cross-border town naming
• List of divided cities
• Metropolitan area