Two markets, two different sides of Jeju City
Jeju City's old town has more than one traditional market. Dongmun Traditional Market is known for produce, seafood, souvenirs and snacks, while Boseong Market has everyday shops and restaurants serving Jeju-style sundae (Korean blood sausage). They are separate places, not two entrances to the same night market.
Dongmun: daytime stalls and a separate night market
According to VisitJeju, Dongmun was established in 1945. Find it at 20 Gwandeok-ro 14-gil, Jeju City. The regular market's listed hours are approximately 07:00–21:00, varying by stall. The Dongmun night market has a different schedule: 18:00–24:00 from November to April and 19:00–24:00 from May to October. Night vendors may close early after selling out. Do not confuse the daytime market's hours with the night market's opening time.
Boseong: a meal with a local food tradition
VisitJeju describes Boseong, established in 1972, as a permanent old-town market at 32 Donggwang-ro 1-gil, Jeju City. Its eateries include Jeju-style sundae, sundae soup with rice, and sundae noodles. Unlike a scheduled night market, Boseong's opening times vary by individual shop, so confirm the restaurant you want before making an evening plan.
Which one should you visit?
Choose Dongmun if you want a broad range of market produce and seasonal night stalls. Choose Boseong if you're interested in Jeju's sundae food culture and the everyday feel of a neighborhood market. You can consider both, but no walking duration or fastest transfer has been independently verified; use a current map.
Before going, check vendor closures, weather, menu prices, ingredients and allergens. VisitJeju lists 064-752-3001 for Dongmun and 064-753-2085 for Boseong; phone availability has not been confirmed.