United cities refers to the neighbouring cities divided by political borders, that were united, when due to political changes they happenned in the same entity. (See also Divided cities)

• Berlin united in 1990
  • West Berlin 1945-1990
  • East Berlin 1945-1990
• Golub-Dobrzyn united in 1951 12,500 inhabitants
  • Golub existed since 1296
  • Dobrzyn city since 1789
• Bielsko-Biala
  • Bielsko
  • Biala
• Rijeka
  • Fiume
  • Sušak