• City-states being part of the overlap. One example of that would be Rome since Vatican City is isolated within Italy.

Africa

• Brazzaville, the capital of the Republic of the Congo, lies directly across the Congo River from Kinshasha, the capital of the Democratic Republic of the Congo
• Livingstone, Zambia, and Victoria Falls, Zimbabwe
• City of Lomé, the capital of Togo, extends over the border to Ghana

Asia

• Aqaba, Jordan; Eilat, Israel; and Taba, Egypt
• The capital of Laos, Vientiane, spills over the Thai–Lao Friendship Bridge (Saphan Mittaphap) to Nong Khai province, Thailand
• Singapore together with Johor Bahru in Malaysia and Riau Islands in Indonesia, also called the Sijori Growth Triangle.

Europe

Within the European Union

• Milan metropolitan area, Italy extends into Canton Ticino, Switzerland
• Vienna-Bratislava metropolitan area overlaps Austria, Hungary and Slovakia
• Strasbourg-Ortenau metropolitan area, France and Germany
• San Sebastian metropolitan area, Spain and France
• Meuse-Rhine Euroregion extends over Maastricht, Netherlands, Liège, Belgium and Aachen, Germany
• Oresund Region extends over Copenhagen, Denmark and Malmö, Sweden
• Lille metropolitan area, France and Mouscron and Kortrijk, Belgium
• Luxembourg metropolitan area, extends into Belgium, France, and Germany
• Frankfurt/Oder, Germany and Slubice, Poland are one city divided by the river Oder
• Görlitz, Germany and Zgorzelec, Poland are one city divided by the river Nysa
• Cieszyn in Southern Poland and Český Těšín in the Czech Republic are one city divided by the Olza River
• Salzburg in Austria extends to Germany
• Gorizia in Italy and Nova Gorica in Slovenia
• Komárno in Slovakia and Komárom in Hungary
• Valga in Estonia and Valka in Latvia are one city historically, divided in 1920 by national border
• Saarbrücken metropolitan area, Germany extends into France ( Forbach, Sarreguemines ) .

Elsewhere in Europe

• Basel metropolitan area, Switzerland extends into France and Germany
• Geneva-Lausanne metropolitan area, Switzerland extends into France
• Ticino metropolitan area, Switzerland extends into Italy
• Iaşi metropolitan area, Romania extends over Prut, including cities like Ungheni from Republica Moldova
• Lower Danube metropolitan area (Brăila-Galaţi (Cantemir) metropolitan area), Romania extends over Danube and Prut, including the Republic of Moldova's urban area of Cantemir-Cahul
• Subotica, Serbia and Szeged, Hungary - urban sprawl between the two close cities

North America

Between the United States and Canada

• Vancouver, British Columbia - extends into Whatcom County, Washington
• Sault Ste. Marie, Michigan and Sault Ste. Marie, Ontario
• Port Huron, Michigan and Sarnia, Ontario areas
• Detroit, Michigan and Windsor, Ontario
• Buffalo-Niagara Falls metropolitan area, New York and St. Catharines-Niagara Falls, Ontario
• Ogdensburg-Massena, New York (St. Lawrence County) and Cornwall-Prescott, Ontario (micropolitan areas)

Between the United States and Mexico

• , and
• El Centro– , and
• , and
• , and
• , and Ciudad Juárez, Chihuahua
• , and
• , and
• Laredo-Nuevo Laredo Metropolitan Area, , and
• , and
• Brownsville– , and

South America

• Rivera, Uruguay, and Santana do Livramento, Brazil
• Ciudad del Este in Paraguay, Foz do Iguaçu in Brazil and Puerto Iguazu in Argentina, also called Triple Frontera or the Tri Border.
• The Tres Fronteras metropolitan area of Tabatinga in Brazil, Leticia in Colombia, and Santa Rosa in Peru form a metropolitan area of nearly 100,000 people.
• The cities of Tacna, Peru, and Arica, Chile, form a combined metropolitan population of over 500,000 people.