Derry, officially Londonderry, is the second-largest city in Northern Ireland, and the fifth-largest on the island of Ireland. Located in County Londonderry, the city now covers both banks of the River Foyle. Cityside and the old walled city being on the west bank and Waterside on the east, with two road bridges and one footbridge crossing the river in-between. The population of the city was 85,279 in the 2021 census, while the Derry Urban Area had a population of 105,066 in 2011.
https://en.wikipedia.org/wiki/Derry