Prompted partly by a similar discussion related to buildings, I thought it may be worthwhile to have some kind of record of which in-game cities have represented various different real cities (in images) just for reference purposes and to avoid repetition where possible. During my time in Jakania for example, we used pictures of Ankara to represent Dokuz and pictures of Istanbul to represent Mesul. As a starting point it may just be useful for players to share any examples of where they have used real-life cities to represent in-game cities then we can keep a running list.
Afghanistan
Kabul: Kahmandi, Bazgaristan
Argentina
Buenos Aires: Iglesia Mayor, Dankuk
La Plata: Española, Dankuk
Mendoza: Liffanes, Dankuk
Rosario: Ponte Iglesias, Dankuk
Santiago del Estero: Belo Mounasterio, Dankuk
Australia
Canberra: Rechtenburg, Mordusia
Melbourne: Valois, Lourenne
Austria
Vienna: Fiskimennhöfn, Telamon and Kien, Hulstria and Gao-Soto
Azerbaijan
Baku: Camaero, Hobrazia
Bahamas
Nassau: Azban, Gaduridos
Barbados
Briddgetown: Takharuun, Gaduridos
Belarus
Minsk: Dolgaraopolis, Dolgava
Canada
Banff: Woodhurst, Hutori
Calgary: Carter City, Hutori
Churchill: Corktown, Hutori
Halifax: Port Prosperity, Hutori
Labrador City: Throne and Altar, Hutori
London: Glentingham, Hutori
Moncton: Wrightstown, Hutori
Montreal: Saint Adrian Hutori
Ottawa: Bekenial, Hutori
Quebec City: Saint Anslem, Hutori
Resolute: Sutton City, Hutori
Squamish: Aylesbury, Hutori
St. John's: Kincardine, Hutori
Summerside: Throne and Altar, Hutori
Thunder Bay: Saint John, Hutori
Toronto: Acton, Hutori
Vancouver: Axminster, Hutori
Whitehorse: Langdon, Hutori
Winnipeg: Tremaine, Hutori
Chile
Valparaíso: Seongtaek, Dankuk
China
Beijing: Longmen, Yingdala and Tian'an, Yingdala
Chongqing: Xujing, Yingdala
Guangzhou: Shencheng, Yingdala
Guilin: Liangjiang, Yingdala
Guiyang: Taixi, Yingdala
Haikou: Xiangao, Yingdala
Hangzhou: Lanbao, Yingdala
Hong Kong: Kaizhou, Yingdala
Macau: Dalibor City, Dalibor
Nanjing: Ciyao, Yingdala
Qingdao: Hazhou, Yingdala
Sanya: Xiangao, Yingdala
Shanghai: Tian'an, Yingdala
Shenzhen: Haiwan, Yingdala
Wenzhou: Jinhuang, Yingdala
Xiamen: Meihua, Yingdala
Xi'an: Yincheng, Yingdala
Denmark
Copenhagen: Küssingen, Dorvik
Dominican Republic
Santo Domingo: Bentasur, Gaduridos
Estonia
Tallinn: Noversk, Dolgava
France
Bordeaux: Delaune, Lourenne
Paris: Atyr, Kanjor and Eroncourt, Lourenne
Evian-les-Baines: Avienne-les-Baines, Lourenne
Marseille: Porte Orleans, Lourenne
Nice: Beaufort, Lourenne
Toulon: Parmentier, Lourenne
Versailles: Lac des Lumieres, Lourenne
Georgia
Batumi: Astoria, Hobrazia
Sukhumi: Samep'o, Hobrazia
Tbilisi: Muzal K'alak'i, Hobrazia
Germany
Rostock: Hauzenwald, Dorvik
Hamburg: Schrudehofen, Dorvik
Lubeck: Vinisk, Dorvik
Berlin: Dunburg, Dundorf
Hungary
Budapest: Čachtice, Deltaria and Hugamest, Endralon
Iceland
Reykjavik: Pico Blanco, Dankuk
Iran
Shiraz: Ramsāhreza, Aldegar
Isfahan: Aldegaria, Aldegar
Tehran: Timārestān, Aldegar
Italy
Rome: Auroria, Selucia and Romula, Istalia
Genoa: Assedo, Selucia
Jamaica
Kingston: Tanzhagilete, Gaduridos
Montego Bay: Bentarionorte, Gaduridos
Japan
Sapporo: Yonseo, Dankuk
Latvia
Riga: Aikums, Dolgava
Lithuania
Klaipėda: Lielgazilani, Dolgava
Vilnius: Jekabvinas, Dolgava and Wolfsheim, Ostland
Malaysia
Kuala Lumpur: Yincheng, Yingdala
Mali
Bamako: Kiego, Ntoto
Timbuktu: Mitinkutiu, Ntoto
Mexico
Acapulco: Playa Del Oriente, Gaduridos
Cabo San Lucas: Las Vistas, Gaduridos
Cancun: Ciudad de Cancon, Gaduridos
Cozumel: Chicciola, Gaduridos
Guadalajara: Maestriq, Gaduridos
Leon: Vespiano, Gaduridos
Manzanillo: Las Nubes, Gaduridos
Mazatlan: Tansaal, Gaduridos
Merida: Meridia, Lourenne
Mexico City: Ciudad Federal de Gadur, Gaduridos
Monterrey: Thiers, Lourenne
Playa del Carmen: Occidente, Gaduridos
Progreso: Riviera, Gaduridos
Puerto Vallarta: Aguazul, Gaduridos
Toluca: Rosaleda, Gaduridos
Monaco
Monte Carlo: Beaumont-sur-Mer, Lourenne
New Zealand
Auckland: New Kosmos, Tropica
Tauranga: Nikutabi, Tropica
Nigeria
Lagos: Neuhaus, Talmoria
Norway
Bergen: Hvítursteinn, Telamon
Haugesund: Cabo San Feras, Dankuk
Lillehammer: Mynydd Ia, Dankuk
Oslo: Ragnarsfjarður, Telamon
Stavanger: Hvalþorp, Telamon
Tromsø: Vesturborg, Telamon
Trondheim: Pyeongreo, Dankuk
Poland
Wrocław: Vilnau, Dorvik
Gdańsk: Frostenbruck, Dorvik
Russia
Moscow: Rodshyadam, Trigunia
Kalingrad: Kaiserburg, Trigunia
Grozny: Gorniy Zamok, Trigunia
Saudi Arabia
Riyadah: Al-Kasraj, Kafuristan
Singapore
Singapore: Guitan, Yingdala
South Korea
Boryeong: Monyeol, Dankuk
Busan: Jugang, Yingdala and Seongtaek, Dankuk
Daegu: Soleunggo, Dankuk
Jeonju: Melang, Dankuk
Seoul: Gongmangdo, Dankuk
Spain
Barcelona: Argona, Selucia
Cartagena: Victoria, Selucia
Valencia: Victoria, Selucia
Switzerland
Bern: Grænnhöfn, Telamon
Zurich: Haldor, Dorvik
Taiwan
Taipei: Mudanwan, Yingdala
Thailand
Bangkok: Udon Nakkhon, Hanzen
Pattaya: Khattaya, Hanzen
Phuket: Chaorat, Hanzen
Trinidad and Tobago
Port of Spain: Mirawak, Gaduridos
Turkey
Ankara: Dokuz, Jakania
Istanbul: Mesul, Jakania
Samsun: Ganşehir, Jakania
United Kingdom
Cardiff: Anpyeong, Dankuk
Glasgow: Port Rhynach, Dankuk
Shrewsbury: Dangmyo, Dankuk
Wrexham: Mynyddoedd Creigiog, Dankuk
United States
Colorado Springs: Dalry, Hutori
Denver: Constantine, Hutori
Honolulu: Tropica City, Tropica
Los Angeles: Sulari, Kalistan
Monterey: Dulnerstaad, Kalistan
Oakland: Kaliburg, Kalistan (also San Francisco)
Olympia: Vrassa City, Kalistan
Oceanside: Luxon, Kalistan
Portland: Senvias, Kalistan and Eshar, Kalistan
Redding: Dahriel, Kalistan
Sacramento: Springfield, Kalistan
San Diego: Yoshimi, Kalistan
San Francisco: Kaliburg, Kalistan (also Oakland)
San Juan: Allorozur, Gaduridos
Santa Barbara: Dana, Kalistan
Seattle: Port Swedes, Kalistan
Spokane: High Bong, Kalistan
Uruguay
Montevideo: Cheonssu, Dankuk
Vatican City
Vatican City: Auroria, Selucia