Yeonsu District (Korean: 연수구) is a district in southern Incheon, South Korea. To the east is Namdong District (Namdong-gu), on its north border is Nam District (Nam-gu), and the Yellow Sea is on the west and south sides. Munhak Mountain (Munhak-san) rises in the north, and Seunggi Stream (Seunggi-cheon) flows south to the Yellow Sea.

Incheon, formerly Jemulpo or Chemulp'o (제물포) until the period after 1910, officially the Incheon Metropolitan City, is a city located in northwestern South Korea, bordering Seoul and Gyeonggi to the east. Inhabited since the Neolithic, Incheon was home to just 4,700 people when it became an international port in 1883. Today, about 3 million people live in the city, making it South Korea's third-most-populous city after Seoul and Busan.