In English, I would not try to use just one word. For some cities, there is an accepted term, eg New Yorkers, Torontonians. But for most cities, there is not.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
Michelle ChaWhat do you call Seoul people?
How about 'Seoul brothers'?
Today the term 'Seoulite' seems to be more familiar than others to ordinary people who live in Seoul, including me. FWIW, it also refers to an album by a famous K-pop artist.