Calculated from the population and area above; their reference dates may differ.
On a familiar scale
≈ the size of Changhua County (reference rung)
The closest rung on the Taiwan reference ladder; see the sources below.
Land per resident
350 m² of land per resident
The inverse of population density, from the same area and population figures.
The outline is fitted to this frame, not a map for measuring distances. Outlying islands may make the main landmass appear smaller.
Change the yardstick
Incheon is “how many times” what?
The multiples on this site default to Taiwan. Pick a place you know and the area, population and density are recalculated against it; your choice is remembered in this browser and carries to other pages.
Incheon Metropolitan City's full administrative territory, including Ganghwa and Ongjin counties' many offshore islands, which the official area and population figures already count. Population is resident registration population (주민등록인구) as at 2025-12-31, from the same Ministry of the Interior and Safety annual report used for Daegu, Daejeon, Ulsan, Sejong and Busan — a different series from the Statistics Korea register-based census (등록센서스) that the South Korea and Seoul pages use, though the two series are usually close. Area is this same report's official administrative-area figure at 2025-12-31, not a figure computed from the map outline. 🔴 Both wired geometry sources fail this site's land-outline bar for Incheon, previously documented in docs/island-data-sources.md: OpenStreetMap's administrative relation encloses about 9,886 km² (+824%, a maritime jurisdiction boundary far out into the Yellow Sea) and Natural Earth's feature measures about 367 km² (−66%, omitting the Ganghwa and Yeongjong island groups). The outline instead uses GADM 4.1's Incheon polygon, which measures about 1,097 km² against the 1,069.56 km² official figure (+2.5%) — within the tolerance already accepted for Macao and Singapore on this site, and it does include Ganghwa, Yeongjong and the other island groups (its bounding box reaches Baengnyeong Island near the North Korean maritime border). GADM is licensed for non-commercial use only; Atlas is not commercialised. See docs/island-data-sources.md.
Average administrative density does not describe population distribution in every neighborhood. Compare population definitions and reference dates alongside the numbers.
Place guide
How should this Incheon profile be read?
Incheon Metropolitan City covers 1,069.56 km² and had 3,051,961 registered residents at year-end 2025, about 2,854 people per km². Its territory reaches far into the Yellow Sea through Ganghwa and Ongjin counties, to island groups closer to North Korea than to Incheon’s own urban core around the airport and port.
A city whose territory is mostly not the airport
Most non-Korean readers picture Incheon as an airport and a port. The administrative city is much more than that: Ganghwa County alone is a large bridge-connected island, and Ongjin County administers islands scattered across the Yellow Sea out to Baengnyeong, near the North Korean maritime border. The official 1,069.56 km² and 3,051,961 residents already include all of it.
Population is resident registration population (주민등록인구), from the same Ministry of the Interior and Safety report as Busan, Daegu, Daejeon, Ulsan and Sejong on this site, at the identical 2025-12-31 reference date as the area figure — a scope-consistent pair even before the outline caught up.
The outline had to draw the islands, not just the port
OpenStreetMap’s administrative relation for Incheon encloses about 9,886 km² against the official 1,069.56 km², +824% — the worst oversizing this site has measured for any place, worse even than Jeju and Bali provinces, because the relation follows a maritime boundary deep into the Yellow Sea. Natural Earth’s feature undercounts instead, at about 367 km², −66%, because it omits the Ganghwa and Yeongjong island groups entirely.
GADM 4.1’s Incheon polygon measures about 1,097 km², +2.5% against the official figure — within the tolerance this site already accepted for Macao and Singapore — and its bounding box reaches 124.61°E, confirming Baengnyeong and the other outer Ongjin islands are drawn, not just Ganghwa and Yeongjong near the mainland.
Questions people ask
About Incheon’s area and population
How big is Incheon?
Incheon covers 1,069.6 km² (reference date 2025-12-31). On the Taiwan reference ladder: ≈ the size of Changhua County.
What is the population of Incheon?
3.1 million — 3,051,961 as of 2025-12-31. The scope of that count is set out under “Scope and definitions” on this page.
What is the population density of Incheon?
About 2,853.5 people per km², derived from the area and population above, whose reference dates may differ. An administrative average does not describe how crowded any particular neighbourhood is.
What do these Incheon figures include?
Incheon Metropolitan City's full administrative territory, including Ganghwa and Ongjin counties' many offshore islands, which the official area and population figures already count. Population is resident registration population (주민등록인구) as at 2025-12-31, from the same Ministry of the Interior and Safety annual report used for Daegu, Daejeon, Ulsan, Sejong and Busan — a different series from the Statistics Korea register-based census (등록센서스) that the South Korea and Seoul pages use, though the two series are usually close. Area is this same report's official administrative-area figure at 2025-12-31, not a figure computed from the map outline. 🔴 Both wired geometry sources fail this site's land-outline bar for Incheon, previously documented in docs/island-data-sources.md: OpenStreetMap's administrative relation encloses about 9,886 km² (+824%, a maritime jurisdiction boundary far out into the Yellow Sea) and Natural Earth's feature measures about 367 km² (−66%, omitting the Ganghwa and Yeongjong island groups). The outline instead uses GADM 4.1's Incheon polygon, which measures about 1,097 km² against the 1,069.56 km² official figure (+2.5%) — within the tolerance already accepted for Macao and Singapore on this site, and it does include Ganghwa, Yeongjong and the other island groups (its bounding box reaches Baengnyeong Island near the North Korean maritime border). GADM is licensed for non-commercial use only; Atlas is not commercialised. See docs/island-data-sources.md.