Seoul Special City
- Date of Sisterhood : August 31, 2015
- Head of Group (Inauguration) : Won-sun Park (As of July 2014) 36th Mayor of Seoul
- Symbols : Bird - Egret, Flower - Chrysanthemum, Tree - Pine, Mascot - Roya & Romie (Baby Egrets)
- Population : 10,331,847 (4,195,438 households)
- Exchanges
- August 31, 2015: Entered sisterhood between Jangheung and Seoul
- November 30, 2016: Participated in the forum & seminar for regional coexistence
- November 3-5, 2017: Regional coexistence forum & regional coexistence exhibition
Jeju Seogwipo
- Date of Sisterhood: May 13, 2011
- Head of Group (Inauguration): Sang Soon Lee (As of September, 2017)
- Symbols: Bird - White-eye, Flower - Cymbidium Orchid, Tree - Camellia, Mascot - Haesuni & Seomdori (Female diver & Commoner)
- Population: 163,225 (67,426 households)
- Exchanges
- May 13, 2011: Entered sisterhood between Jangheung-gun and Seogwipo-si
- June 16-22, 2011: Economic exchange for agricultural specialty
- July 21-22, 2011: Visited the conference for vitalizing seaway between Seongsan and Jangheung
- November 6-8: Participated in 2015 Seogwipo International Mandarin Exhibition
- January 18-20, 2017: Youth home stay exchange
- August 1-3, 2017: Youth home stay exchange
Seongnam Bundang-gu
- Date of Sisterhood: November 22, 2006
- Head of Group (Inauguration): Gi-cheon Yoon (November 3, 2014)
- Symbols: Bird - Magpie, Flower - Royal Azalea, Tree - Ginkgo, Mascot - Saerongi & Saenami (Ginkgo Leaf)
- Population: 501,419 (185,847 households)
- Exchanges
- November 22, 2006: Entered sisterhood between Jangheung-gun and Bundang-gu
- September 12, 2015: Participated in 12th Bundang-gu Hanmaeum Festival
- November 30, 2016: Participated in the forum & seminar for regional coexistence
- October 28, 2017: Hosted Direct Trade Market in 14th Bundang-gu Hanmaeum Festival
Busan Yeongdo-gu
- Date of Sisterhood: November 13, 1998
- Head of Group (Inauguration): Yoon-tae Oe (July 1, 2006 - Present) 4th, 5th, 6th popular election
- Symbols: Bird - Seagull, Flower - Camellia, Tree - Antipathes Japonica, Mascot - Yeonggabi (Young Wonsiwon)
- Population: 132,102 (56,505 households)
- Exchanges
- November 13, 1998: Entered sisterhood between Jangheung-gun and Yeongdo-gu
- April 16, 1999: Discussion for Vitalizing Exchange with Yeongdo-gu representative group
- September 15, 2017: Participated in the opening ceremony of 25th Yeongdo Bridge Festival
- October 20, 2017: Participated in the opening ceremony of Korea Integrated Medicine Exhibition
Incheon Seo-gu
- Date of Sisterhood: May 13, 2013
- Head of Group (Inauguration): Beom-seok Kang (July 1, 2014 - Present) 6th popular election
- Symbols: Bird - Magpie, Flower - Chrysanthemum, Tree - Ginkgo, Mascot - Seodongi
- Population: 504,161 (189,791 households)
- Exchanges : May 13, 2013: Entered sisterhood between Jangheung-gun and Seo-gu office
Seoul Seodaemun-gu
- Date of Sisterhood: February 5, 2013
- Head of Group (Inauguration): Seok-jin Mun (July 1, 2010 - Present) 5th and 6th popular election
- Symbols: Bird - Magpie, Flower - Rose, Tree: Pine
- Population: 309,751 (134,847 households)
- Exchanges
- February 5, 2013: Entered sisterhood between Jangheung-gun and Seodaemun-gu
- August 14-15, 2017: Participated in Seodaemun Independence and Democracy Festival
- September 26-27, 2017: Participated in Chuseok Celebrating Direct Trade Market
- November 9-10, 2017: Public officers' football club of Jangheung-gun visited Seodaemun-gu
Seoul Dongjak-gu
- Date of Sisterhood: July 16, 1997
- Head of Group (Inauguration): Chang-wu Lee (July 1, 2014 - Present) 6th popular election
- Symbols: Bird - Egret, Flower - Chrysanthemum, Tree - Pine, Mascot: Roya & Romie (Baby Egret)
- Population: 401,373 (170,716 households)
- Exchanges
- July 16, 1997: Entered sisterhood between Jangheung-gun and Dongjak-gu
- November 16-17, 2017: Participated in Hanmaeum 2.5.4 Farmer's Market