This is a list of places in South Korea which have standing links to local communities in other countries. In most cases, the association, especially when formalised by local government, is known as "town twinning" (usually in Europe) or "sister cities" (usually in the rest of the world).
A Andong
Corinth, Greece Cusco, Peru Pingdingshan, China Sagae, Japan Xi'an, China
Ansan
Anshan, China Kholmsk, Russia Las Vegas, United States Yuzhno-Sakhalinsk, Russia
Anseong
Brea, United States Heyuan, China
Anyang
Anyang, China Garden Grove, United States Hampton, United States Komaki, Japan Naucalpan de Juárez, Mexico Sorocaba, Brazil Tokorozawa, Japan Ulan-Ude, Russia Weifang, China
B Bonghwa
Selenge, Mongolia Tongchuan, China
Boryeong
Fujisawa, Japan Hangu (Tianjin), China Qingpu (Shanghai), China Shoreline, United States Takahama, Japan
Buan Wulong (Chongqing), China
Bucheon
Bakersfield, United States Harbin, China Khabarovsk, Russia Valenzuela, Philippines
Busan
Auckland, New Zealand Barcelona, Spain Casablanca, Morocco Cebu, Philippines Chicago, United States Dar es Salaam, Tanzania Dubai, United Arab Emirates Fukuoka, Japan Ho Chi Minh City, Vietnam Istanbul, Turkey Kaohsiung, Taiwan Los Angeles, United States Luanda, Angola Montreal, Canada Mombasa, Kenya Mumbai, India Phnom Penh, Cambodia Rio de Janeiro, Brazil Saint Petersburg, Russia Shanghai, China Shimonoseki, Japan Surabaya, Indonesia Thessaloniki, Greece Tijuana, Mexico Valparaíso, Chile Victoria (state), Australia Vladivostok, Russia Western Cape, South Africa Yangon, Myanmar
C Changwon
Annapolis, United States Da Nang, Vietnam Guadalajara, Mexico Himeji, Japan Jacksonville, United States Jersey City, United States Kure, Japan Ma'anshan, China Mỹ Tho, Vietnam Nantong, China Shulan, China Ussuriysk, Russia Viña del Mar, Chile Yamaguchi, Japan Zapopan, Mexico
Cheonan
Beaverton, United States Büyükçekmece, Turkey Shijiazhuang, China Wendeng (Weihai), China
Cheongdo Nenjiang, China
Cheongju
Bellingham, United States Tottori, Japan Wuhan, China
Cheorwon Đồng Tháp, Vietnam
Chuncheon
Addis Ababa, Ethiopia Higashichikuma District, Japan Hōfu, Japan Kakamigahara, Japan
Chungju
Taichung, Taiwan Yugawara, Japan
D Daegu
Almaty, Kazakhstan Atlanta, United States Chengdu, China Da Nang, Vietnam Hiroshima, Japan Milan, Italy Minas Gerais, Brazil Ningbo, China Plovdiv, Bulgaria Qingdao, China Saint Petersburg, Russia Taipei, Taiwan
Daegu – Seo
Bacolod, Philippines Hexi (Tianjin), China Keqiao (Shaoxing), China
Daejeon
Bình Dương, Vietnam Brisbane, Australia
Calgary, Canada Durban, South Africa Guadalajara, Mexico Montgomery County, United States Nanjing, China Novosibirsk, Russia Ōda, Japan Sapporo, Japan Seattle, United States Shenyang, China Uppsala, Sweden
Daejeon – Jung
Malabon, Philippines Xining, China
Daejeon – Seo
Khövsgöl, Mongolia Wenling, China
Daejeon – Yuseong Xigang (Dalian), China
Dangjin
Rizhao, China Snohomish County, United States
Donghae
Bolu, Turkey Federal Way, United States Haikou, China Jiamusi, China Nakhodka, Russia Saint John, Canada Tsuruga, Japan Tumen, China
G Gangneung
Algemesí, Spain Chichibu, Japan Deyang, China Irkutsk, Russia Jiaxing, China Jingzhou, China
Sorrento, Italy
Gimcheon
Chengdu, China Nanao, Japan Subang, Indonesia
Gimhae
Ayodhya, India Biên Hòa, Vietnam Çorum, Turkey Lakewood, United States Munakata, Japan Salem, United States Wuxi, China
Gimpo
Glendale, United States Heze, China
Goyang
Eisenstadt, Austria Hakodate, Japan Heerhugowaard, Netherlands Loudoun County, United States Maui County, United States Qiqihar, China San Bernardino, United States
Gunsan
Jamshedpur, India Pimpri-Chinchwad, India Tacoma, United States Windsor, Canada Yantai, China
Guri
Calamba, Philippines Carrollton, United States
Gurye
Chizhou, China Unzen, Japan
Gwacheon
Burlington, United States Nanning, China Shirahama, Japan
Gwangju
Changzhi, China Guangzhou, China Medan, Indonesia Nghệ An, Vietnam San Antonio, United States Sendai, Japan Tainan, Taiwan
Gwangmyeong
Austin, United States Liaocheng, China Osnabrück, Germany Yamato, Japan
Gyeongju
Chizhou, China Huế, Vietnam Nara, Japan Nitra, Slovakia Obama, Japan Ōita Prefecture, Japan Pompei, Italy Versailles, France Xi'an, China
Gyeongsan
Jōyō, Japan Xihai'an (Qingdao), China
H Hanam
Little Rock, United States Rushan, China Shah Alam, Malaysia
Hoengseong
Kakegawa, Japan Linhai, China Yazu, Japan
Hongcheon Sanary-sur-Mer, France
I Icheon
Jingdezhen, China Kōka, Japan Limoges, France Santa Fe, United States Seto, Japan
Iksan
Culver City, United States Odense, Denmark Zhenjiang, China
Incheon
Alexandria, Egypt Anchorage, United States Banten, Indonesia Burbank, United States Chongqing, China Haiphong, Vietnam Honolulu, United States Kitakyushu, Japan Kobe, Japan Kolkata, India Manila, Philippines Mérida, Mexico Panama City, Panama Philadelphia, United States Phnom Penh, Cambodia Shenyang, China Tel Aviv, Israel Ulaanbaatar, Mongolia Veneto, Italy Vladivostok, Russia Yekaterinburg, Russia
Incheon – Gyeyang
Battambang, Cambodia Vũng Tàu, Vietnam Yancheng, China
J Jangheung
Acheng (Harbin), China Bacoor, Philippines Changxing, China Claver, Philippines
Haiyan, China Washington County, United States
Jecheon
Hualien, Taiwan Pasay, Philippines Qichun, China Spokane, United States Zhangshu, China
Jeju City
Guilin, China Laizhou, China Rouen, France Sanda, Japan Santa Rosa, United States Wakayama, Japan
Jeonju
Antalya, Turkey Kanazawa, Japan San Diego, United States Suzhou, China
Jeongeup Xuzhou, China
Jinju
Eugene, United States Kitami, Japan Winnipeg, Canada Xi'an, China
M Miryang
Nanping, China Ōmihachiman, Japan Yasugi, Japan
Mokpo
Beppu, Japan Hammerfest, Norway Lianyungang, China Xiamen, China
N Naju
Kurayoshi, Japan Wenatchee, United States
Namyangju
Changzhou, China Dartford, England, United Kingdom Kampong Cham, Cambodia Vinh, Vietnam
Nonsan
Jining, China Jinzhou, China Langfang, China
O Osan
Hidaka, Japan Killeen, United States Quảng Nam, Vietnam
P Paju
Coquitlam, Canada Cuenca, Spain Eskişehir, Turkey Hadano, Japan Jinzhou, China Mudanjiang, China Rancagua, Chile Sasebo, Japan Stellenbosch, South Africa Toowoomba, Australia
Pohang
Fukuyama, Japan Hunchun, China İzmit, Turkey Jōetsu, Japan Pittsburg, United States Vladivostok, Russia
Pyeongtaek
Aomori, Japan Irpin, Ukraine Mobile, United States Rizhao, China
S Samcheok
Akabira, Japan Dongying, China Jixi, China Kanda, Japan Korsakov, Russia Kungur, Russia Kurobe, Japan Leesburg, United States Mareeba, Australia Wangqing, China
Sejong has no sister cities.
Seogwipo
Hangzhou, China
Kashima, Japan Kinokawa, Japan Salinas, United States Xingcheng, China
Seongnam
Aurora, United States Piracicaba, Brazil Shenyang, China
Seoul
Ankara, Turkey Astana, Kazakhstan Athens, Greece Bangkok, Thailand Beijing, China Bogotá, Colombia Cairo, Egypt Hanoi, Vietnam Honolulu, United States Jakarta, Indonesia Mexico City, Mexico Moscow, Russia New South Wales, Australia
San Francisco, United States São Paulo, Brazil Taipei, Taiwan Tashkent, Uzbekistan Tokyo, Japan Ulaanbaatar, Mongolia Warsaw, Poland Washington, D.C., United States
Seoul – Dobong Changping (Beijing), China
Seoul – Eunpyeong Canterbury, Australia
Seoul – Gangdong
Fengtai (Beijing), China
Musashino, Japan Qinhuangdao, China Segovia, Spain Songino Khairkhan (Ulaanbaatar), Mongolia Tangshan, China Willoughby, Australia
Seoul – Gangnam
Chaoyang (Beijing), China Grand Rapids, United States Gwinnett County, United States Licheng (Jinan), China Riverside, United States Woluwe-Saint-Pierre, Belgium Zhongshan (Dalian), China
Seoul – Gangseo
Changning (Shanghai), China Otaru, Japan Penrith, Australia Tarlac City, Philippines Zhaoyuan, China
Seoul – Gwanak
Daxing (Beijing), China Hohhot, China Kingston upon Thames, England, United Kingdom Tiexi (Shenyang), China Yanji, China
Seoul – Gwangjin
Ereğli, Turkey Khan Uul (Ulaanbaatar), Mongolia
Seoul – Jongno Prague 1 (Prague), Czech Republic
Seoul – Jungnang
Dongcheng (Beijing), China Kazanlak, Bulgaria Meguro (Tokyo), Japan
Seoul – Mapo
Katsushika (Tokyo), Japan Shijingshan (Beijing), China
Seoul – Seocho
Cuauhtémoc (Mexico City), Mexico Irvine, United States Laoshan (Qingdao), China Manhattan (New York), United States Perth, Australia Şişli, Turkey South-Western AO (Moscow), Russia Suginami (Tokyo), Japan
Seoul – Songpa
Asunción, Paraguay Chaoyang (Beijing), China Chingeltei (Ulaanbaatar), Mongolia Christchurch, New Zealand Fairfax County, United States Karaganda, Kazakhstan Minhang (Shanghai), China Panyu (Guangzhou), China Steglitz-Zehlendorf (Berlin), Germany Tonghua, China
Seoul – Yangcheon
Bankstown, Australia Chaoyang (Changchun), China Nakano (Tokyo), Japan
Seoul – Yeongdeungpo
Kishiwada, Japan Mentougou (Beijing), China Monterey Park, United States
Sinan Granbury, United States
Suncheon
Antalya, Turkey Columbia, United States Izumi, Japan Kragujevac, Serbia Nantes, France Taiyuan, China
Suwon
Asahikawa, Japan Bandung, Indonesia Cluj-Napoca, Romania Curitiba, Brazil Fez, Morocco Freiburg im Breisgau, Germany Hải Dương, Vietnam Jinan, China Nizhny Novgorod, Russia Siem Reap, Cambodia Toluca, Mexico Townsville, Australia Yalova, Turkey
T Tongyeong
Reedley, United States Rongcheng, China Samara, Russia Sayama, Japan Tamano, Japan Yunfu, China
U Uiwang
Kimitsu, Japan North Little Rock, United States Xianning, China
Ulsan
Burgas, Bulgaria Changchun, China Hagi, Japan Houston, United States Hualien, Taiwan Khánh Hòa, Vietnam Kocaeli, Turkey Portland, United States Santos, Brazil Tomsk, Russia Wuxi, China
W Wando
Imari, Japan
Lianyun (Lianyungang), China Rongcheng, China
Wonju
Edmonton, Canada Hefei, China Roanoke, United States
Y Yanggu
Chizu, Japan Jianli, China Saint-Mandé, France
Yangju
Dongying, China Fujieda, Japan Henrico County, United States
Yangyang
Daisen, Japan Rokkasho, Japan Xiangzhou (Xiangyang), China
Yeoju
Kamimine, Japan Tsunan, Japan
Yeongam
Hirakata, Japan Huzhou, China
Yeongcheon
Kaifeng, China Kuroishi, Japan
Yeongju
Bozhou, China Fujinomiya, Japan Jining, China Nantou, Taiwan Shaoguan, China
Yesan Knoxville, United States
Yongin
Ajman, United Arab Emirates Fergana Region, Uzbekistan Fullerton, United States Kayseri, Turkey Kota Kinabalu, Malaysia Williamson County, United States Yangzhou, China
References