Fukui is 1.63× the size of Réunion (France)

Fukui (prefecture of Japan) covers about 4,220 km² (1,630 mi²) and Réunion (France) (overseas region of France) about 2,580 km² (997 mi²). Below, both outlines are drawn at one scale and centred on each other.

4,220km²Fukui
2,580km²Réunion (France)

20 km

Fukui
Réunion (France)

What fits

Réunion (France) is 61% of the size of Fukui.
Fukui is larger by 1,640 km² (633 mi²), which is 63% of the area of Réunion (France).
Measured in Belgiums: Fukui is about 0.14, Réunion (France) about 0.08.

How they differ

Fukui is larger, but Réunion (France) has the larger population: 881,000 against 765,000, 1.15× as many people.
Per square kilometre that is 341 in Réunion (France) against 181 in Fukui: Réunion (France) is 1.88× as densely populated.
Their centres are about 10,600 km apart.
A standard web map misstates the comparison: Fukui at 36°N is drawn about 1.5× too large and Réunion (France) at 21°S about 1.1×, so the map shows Fukui as 2.16× the size of Réunion (France) instead of 1.63×.
Together Fukui and Réunion (France) cover 6,800 km², close to the size of Palestine (6,070 km², 11% smaller).
The gap between them, 1,640 km², is about the size of Comoros (1,670 km²).
At Réunion (France)'s density, Fukui would have 1.4 million people (it has 765,000). At Fukui's density, Réunion (France) would have 468,000 (it has 881,000).
Fukui's centre is 56.9° of latitude, about 6,330 km, farther north than Réunion (France)'s.
Fukui is the 35th largest of the 47 prefectures of Japan and covers 1.1% of its area; it is the 31st most densely populated of them.
Réunion (France) is the 15th largest of the 18 regions of France and covers 0.4% of its area; it is the 3rd most densely populated of them.
Fukui lies about 57° of latitude (roughly 6,330 km) north of Réunion (France), on the other side of the equator.
Shared out evenly, each person in Fukui would have about 5,520 m² and each person in Réunion (France) about 2,930 m².
Laid side by side, Fukui and Réunion (France) would cover 6,800 km², 1.19× the size of Brunei.
Together they have 1.6 million people, 90% as many people as North Macedonia.

Side by side

	Fukui	Réunion (France)
Is a	PrefectureJapan	Overseas regionFrance
Area, measured	4,220 km²1,630 mi²	2,580 km²997 mi²
Official area	4,190 km²Wikidata	2,510 km²Wikidata
Rank by area	35th of 47in Japan	15th of 18in France
Population	765,000Wikidata, 2021	881,000Wikidata, 2022
Rank by population	43rd of 47in Japan	13th of 18in France
Density	181 per km²	341 per km²
Capital	Fukui	Saint-Denis
Latitude range	35°N to 36°N	21°S to 21°S

Population: Wikidata 2021 and Wikidata 2022. Official figures: Wikidata (CC0).

Wikidata's official figure of 4,190 km² agrees with our measured area of 4,220 km², to within 2%.
Our measured 2,580 km² is 2.8% above Wikidata's official figure of 2,510 km². Official figures can include inland water or count land that an outline draws differently.

Similar in size to Fukui

Similar in size to Réunion (France)

More comparisons

Sources and method

Outlines: Natural Earth, 1:10m Admin 1 - States, Provinces, public domain
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