Sister cities

Twinned with Seoul

29 of 33 in this atlas

Seoul's twinning ties span every inhabited continent, linking it to capitals and major cities across Asia, Europe, Africa, and the Americas, from Beijing and Tokyo to Cairo, Moscow, Paris, and Washington. Almost all of these pairings are mutual, with each partner naming Seoul in return. The single exception is New Delhi, which Seoul lists as a partner without reciprocal acknowledgment, alongside a separate mutual tie to Delhi itself.