Chongqing is 1.06× the size of Bohai Sea

Chongqing (municipality) covers about 82,400 km² (31,800 mi²) and the Bohai Sea (sea) about 77,900 km² (30,100 mi²). Below, both outlines are drawn at one scale and centred on each other. The Bohai Sea outline is Natural Earth’s, checked against the published area.

82,400km²Chongqing
77,900km²Bohai Sea

100 km

Chongqing
Bohai Sea

What fits

Bohai Sea is 95% of the size of Chongqing.
Chongqing is larger by 4,500 km² (1,740 mi²), which is 5.8% of the area of Bohai Sea.
Measured in Belgiums: Chongqing is about 2.69, Bohai Sea about 2.54.

How they differ

Their centres are about 1,490 km apart.
On a standard web map Bohai Sea looks larger than Chongqing: Chongqing at 30°N is drawn about 1.3× too large and Bohai Sea at 39°N about 1.7×, so the map shows Bohai Sea as 1.17× the size of Chongqing, when Chongqing is 1.06× the size of Bohai Sea.
Together Chongqing and Bohai Sea cover 160,000 km², close to the size of Tunisia (157,000 km², 2.3% smaller).
The gap between them, 4,500 km², is about the size of Trinidad and Tobago (5,120 km²).
Bohai Sea's centre is 8.9° of latitude, about 990 km, farther north than Chongqing's.
Chongqing is a municipality of China; it is not drawn with its waters removed, and its measured area is the Natural Earth outline's.
The Bohai Sea is a sea and ranks 31st of the 42 seas on sizeversus by area.
Laid out flat, Chongqing stretches about 445 km north to south and 469 km east to west; the Bohai Sea about 429 km by 404 km.
Wikidata’s published figure of 77,000 km² agrees with our measured 77,900 km², to within 2%.

Who wins on what

Measure	Winner	By
Larger area	Chongqing	1.06×
Farther north	Bohai Sea	8.9° of latitude
Stretched more on a web map	Bohai Sea	1.7× against 1.3×

Both against the same yardsticks

Yardstick	Chongqing	Bohai Sea
Belgium 30,700 km²	2.69×	2.54×
United Kingdom 244,000 km²	0.34×	0.32×
Germany 358,000 km²	0.23×	0.22×
Japan 374,000 km²	0.22×	0.21×
France 548,000 km²	0.15×	0.14×
India 3,151,000 km²	0.03×	0.02×
Brazil 8,473,000 km²	0.01×	0.01×
United States 9,447,000 km²	0.01×	0.01×
Russia 16,980,000 km²	1 in 206	1 in 218

Each figure is the place's area divided by the yardstick's.

Side by side

	Chongqing	Bohai Sea
Is a	MunicipalityChina	Seasea on sizeversus
Area, measured	82,400 km²31,800 mi²	77,900 km²30,100 mi²
Area, published	82,400 km²Wikidata	77,000 km²Wikidata
Rank by area	–	31st of 42seas
Greatest depth	–	30 mWikidata
Latitude range	28°N to 32°N	37°N to 41°N
On the shore	–	1 on the shore

Published figures: Wikidata (CC0). A lake or a sea has no legal boundary: the measured area is that of Natural Earth’s outline, and it is shown beside the published one.

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.

Similar in size to Chongqing

Similar in size to Bohai Sea

More comparisons

Sources and method

Outlines: Lakes and seas: Natural Earth 1:10m physical vectors (public domain), kept only where the measured area is within 10% of the published one. Countries and regions: Natural Earth, 1:10m Admin 0 and Admin 1, public domain.
Boundary: De facto, as drawn by Natural Earth. A lake or a sea has no legal boundary of its own; the outline is a cartographic one.
Area: Measured on the WGS84 ellipsoid from the full-detail outlines, shown rounded. The published figure comes from Wikidata (CC0), fetched 2026-11-11, and is shown beside the measured one.
Drawing: Each outline is projected with an equal-area projection centred on its own centroid, so areas stay true and the two can be laid over each other.
Data built: 2026-11-11

Full method