Sea
Bohai Sea
Natural Earth’s outline of the Bohai Sea measures about 77,900 km² (30,100 mi²), the 31st largest of the 42 seas on sizeversus, and about the same size as Serbia.
100 km
- Bohai Sea
- Serbia
The numbers
- 77,900km²Area, measured30,100 mi² · Natural Earth outline
- 77,000km²Area, publishedWikidata · agrees within 2%
- 30mGreatest depthWikidata
The area is measured from the outline drawn above, on the WGS84 ellipsoid; the published figure is shown beside it, and a water body is kept only if the two are within 10%.
What the numbers say about the Bohai Sea
- The Arabian Sea, the largest of the 42 seas ranked on sizeversus, is 53.0× the size of the Bohai Sea; the Bohai Sea ranks 31st.
- The Bohai Sea sits between the White Sea (92,200 km²) and the Ungava Bay (49,600 km²) in the ranking.
- Counted as a country, the Bohai Sea would be larger than 96 of the 212 countries listed on sizeversus and would rank 117th by area, between Czechia (78,800 km²) and Serbia (77,600 km²).
- It is larger than 11 of the 51 US states and districts (the biggest of them is West Virginia, 62,700 km²) and smaller than 40.
- It is larger than 5 of the 31 provinces and regions of China (the biggest of them is Ningxia, 52,100 km²) and smaller than 26.
- The closest US state is South Carolina (80,200 km²): the Bohai Sea is about the same size as South Carolina.
- Wikidata records a greatest depth of 30 m.
- On a standard web map (Web Mercator), a place at 39°N is drawn about 1.7× too large in area, so the Bohai Sea looks bigger there than it is.
- Laid out flat, the Bohai Sea stretches about 429 km north to south and 404 km east to west.
- Wikidata’s published figure of 77,000 km² agrees with our measured 77,900 km², to within 2%.
About the same size as
Countries
On the shore
Natural Earth’s outlines of China lie within 25 km of the outline of the Bohai Sea. That is what its geometry says, and it is not a statement about who owns the water or where any border runs in it.
Names
- Bohai Seathe name in this page’s titlesource: Wikidata’s English label
- Bo Haialso calledsource: Natural Earth
Where the Bohai Sea ranks
The Bohai Sea is the 31st largest of the 42 seas on sizeversus, ranked by measured area.
Compare the Bohai Sea
Share this outline
Sources and method
- Outline
- Natural Earth, 1:10m Marine Areas (geography_marine_polys), public domain (Marine Areas (geography_marine_polys)). Natural Earth draws marine areas for labels and cuts them at named sub-areas; the outline is kept because its area matches the published one.
- Boundary
- A lake or a sea has no legal boundary of its own. The outline is a cartographic one, and the page says so by showing the measured area beside the published one.
- Area basis
- Measured outline: computed on the WGS84 ellipsoid from the full-detail outline and shown rounded. Published figure: Wikidata (CC0), fetched 2026-11-11. An outline is kept within 10% of the published figure and matched to other places automatically within 5%.
- Depth, volume, height
- As recorded in Wikidata; a volume that cannot be right for the area and depth is left out.
- Shore
- Countries whose Natural Earth outline contains or comes close to the water's outline; computed, not a statement of ownership.
- Drawing
- Each outline is projected with an equal-area projection centred on its own centroid, so areas stay true and two can be laid over each other.
- Data built
- 2026-11-11