Calculated from the population and area above; their reference dates may differ.
On a familiar scale
≈ the size of Kinmen County (reference rung)
The closest rung on the Taiwan reference ladder; see the sources below.
Land per resident
1,089 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
Kinmen County 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.
Kinmen County at year-end 2025: 151.656 km² of land and 139,313 registered residents, both from the same Ministry of the Interior table used for Green Island, Orchid Island and Xiaoliuqiu, and reconciling exactly with the county's six townships (Jincheng 21.713 + Jinhu 41.696 + Jinsha 41.19 + Jinning 29.854 + Lieyu 16.003 + Wuqiu 1.2). 🔴 Both wired geometry sources fail this site's land-outline bar for Kinmen: OpenStreetMap's county relation is a maritime-jurisdiction boundary measuring about 998 km² (+558%), and Natural Earth's Kinmen feature draws the main island alone at the wrong area. The outline instead uses GADM 4.1's Kinmen county polygon, which measures about 150.24 km² against the 151.656 km² official figure (−0.93%) — within this site's accepted tolerance and explained by the one component GADM's polygon omits: Wuqiu, an exclave near the Fujian coast, 1.2 km² (0.79% of the county). 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 Kinmen County profile be read?
Kinmen County covers 151.656 km² and had 139,313 registered residents at year-end 2025, about 919 people per km². It sits in the Taiwan Strait just off the Fujian coast, closer to mainland China than to Taiwan Main Island, and is administered as six townships spread across a main island, a smaller island and several outlying islets.
One table, six townships, one exclave
Area and population come from the same Ministry of the Interior household-registration table already used for Green Island, Orchid Island and Xiaoliuqiu on this site, and the county total reconciles exactly with its six townships: Jincheng 21.713 + Jinhu 41.696 + Jinsha 41.19 + Jinning 29.854 + Lieyu 16.003 + Wuqiu 1.2 = 151.656 km². Wuqiu is the outlier in every sense: it is an exclave roughly 100 km northwest of the rest of the county, nearer the Fujian coast than to Kinmen’s main island group.
The outline on this page is a GADM 4.1 polygon and omits Wuqiu — 1.2 km² of the 151.656 km² total, still counted in the area and population figures. This is disclosed rather than patched, following the same rule this site applies to Penghu’s uninhabited islands and Lanyu’s outlying islet.
Why two other sources were rejected first
OpenStreetMap’s administrative relation for Kinmen County traces a maritime jurisdiction boundary — three boxes of open water around the main island, Lieyu and Wuqiu — measuring about 998 km², +558% of the true land area. Natural Earth’s Kinmen feature looks closer at first glance (+1.8% against the county figure) but is a trap: its bounding box excludes Lieyu and Wuqiu entirely, so it is actually drawing the main island alone against the wrong denominator.
Even Taiwan’s own National Land Surveying and Mapping Center boundary shapefiles were tried and failed, measuring +21.8% for the same reason the OpenStreetMap township relations already on this site were rejected: Taiwan’s administrative boundary runs to the low-water line, while the land-area statistic used for population density does not. GADM 4.1’s polygon, at −0.93% before adding back Wuqiu and −0.14% after, was the first source to pass.
Questions people ask
About Kinmen County’s area and population
How big is Kinmen County?
Kinmen County covers 151.7 km² (reference date 2025-12-31). On the Taiwan reference ladder: ≈ the size of Kinmen County.
What is the population of Kinmen County?
139,313 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 Kinmen County?
About 918.6 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 Kinmen County figures include?
Kinmen County at year-end 2025: 151.656 km² of land and 139,313 registered residents, both from the same Ministry of the Interior table used for Green Island, Orchid Island and Xiaoliuqiu, and reconciling exactly with the county's six townships (Jincheng 21.713 + Jinhu 41.696 + Jinsha 41.19 + Jinning 29.854 + Lieyu 16.003 + Wuqiu 1.2). 🔴 Both wired geometry sources fail this site's land-outline bar for Kinmen: OpenStreetMap's county relation is a maritime-jurisdiction boundary measuring about 998 km² (+558%), and Natural Earth's Kinmen feature draws the main island alone at the wrong area. The outline instead uses GADM 4.1's Kinmen county polygon, which measures about 150.24 km² against the 151.656 km² official figure (−0.93%) — within this site's accepted tolerance and explained by the one component GADM's polygon omits: Wuqiu, an exclave near the Fujian coast, 1.2 km² (0.79% of the county). GADM is licensed for non-commercial use only; Atlas is not commercialised. See docs/island-data-sources.md.
What else is Kinmen County called?
Also written or known as Kinmen, Quemoy. Every one of those names refers to the place measured on this page.