Hainan is 1.40× the size of Sardinia (Italy)

Hainan (province of China) covers about 33,800 km² (13,100 mi²) and Sardinia (Italy) (region of Italy) about 24,100 km² (9,310 mi²). Below, both outlines are drawn at one scale and centred on each other.

33,800km²Hainan
24,100km²Sardinia (Italy)

50 km

Hainan
Sardinia (Italy)

What fits

Sardinia (Italy) is 71% of the size of Hainan.
Hainan is larger by 9,730 km² (3,760 mi²), which is 40% of the area of Sardinia (Italy).
Measured in Belgiums: Hainan is about 1.10, Sardinia (Italy) about 0.79.

How they differ

Hainan also has the larger population: 10.1 million against 1.6 million, 6.19× as many people.
Per square kilometre that is 298 in Hainan against 68 in Sardinia (Italy): Hainan is 4.41× as densely populated.
Their centres are about 9,510 km apart.
On a standard web map Sardinia (Italy) looks larger than Hainan: Hainan at 19°N is drawn about 1.1× too large and Sardinia (Italy) at 40°N about 1.7×, so the map shows Sardinia (Italy) as 1.09× the size of Hainan, when Hainan is 1.40× the size of Sardinia (Italy).
Together Hainan and Sardinia (Italy) cover 58,000 km², close to the size of Togo (56,900 km², 1.9% smaller).
The gap between them, 9,730 km², is about the size of Lebanon (10,000 km²).
At Sardinia (Italy)'s density, Hainan would have 2.3 million people (it has 10.1 million). At Hainan's density, Sardinia (Italy) would have 7.2 million (it has 1.6 million).
Sardinia (Italy)'s centre is 20.9° of latitude, about 2,320 km, farther north than Hainan's.
Hainan is the 28th largest of the 31 provinces and regions of China and covers 0.4% of its area; it is the 15th most densely populated of them.
Sardinia (Italy) is the 3rd largest of the 20 regions of Italy and covers 8.0% of its area; it is the 17th most densely populated of them.
Sardinia (Italy) lies about 21° of latitude (roughly 2,320 km) north of Hainan.
Shared out evenly, each person in Hainan would have about 3,360 m² and each person in Sardinia (Italy) about 14,810 m².
Laid side by side, Hainan and Sardinia (Italy) would cover 58,000 km², about the same size as Togo.
Together they have 11.7 million people, about as many people as Belgium.

Side by side

	Hainan	Sardinia (Italy)
Is a	ProvinceChina	RegionItaly
Area, measured	33,800 km²13,100 mi²	24,100 km²9,310 mi²
Official area	33,900 km²Wikidata	23,900 km²Wikidata
Rank by area	28th of 31in China	3rd of 20in Italy
Population	10.1 millionWikidata, 2020	1.6 millionWikidata, 2020
Rank by population	28th of 31in China	11th of 20in Italy
Density	298 per km²	68 per km²
Capital	Haikou	Cagliari
Latitude range	18°N to 20°N	39°N to 41°N

Population: Wikidata 2020. Official figures: Wikidata (CC0).

Wikidata's official figure of 33,900 km² agrees with our measured area of 33,800 km², to within 2%.
Wikidata's official figure of 23,900 km² agrees with our measured area of 24,100 km², to within 2%.

Similar in size to Hainan

Similar in size to Sardinia (Italy)

More comparisons

Sources and method

Outlines: Natural Earth, 1:10m Admin 1 - States, Provinces, public domain. The outline of Sardinia (Italy) is the provinces Natural Earth draws there, joined along their shared borders.
Boundary: De facto, as drawn by Natural Earth. A region is drawn whole, every island included; a country is its main territory.
Area: Measured on the WGS84 ellipsoid from the full-detail outlines, shown rounded.
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: 2026-11-12

Full method