Réunion (France) is 1.06× the size of Saga

Réunion (France) (overseas region of France) covers about 2,580 km² (997 mi²) and Saga (prefecture of Japan) about 2,450 km² (945 mi²). Below, both outlines are drawn at one scale and centred on each other.

2,580km²Réunion (France)
2,450km²Saga

20 km

Réunion (France)
Saga

What fits

Saga is 95% of the size of Réunion (France).
Réunion (France) is larger by 135 km² (52.2 mi²), which is 5.5% of the area of Saga.
Measured in Belgiums: Réunion (France) is about 0.08, Saga about 0.08.

How they differ

Réunion (France) also has the larger population: 881,000 against 810,000, 1.09× as many people.
Per square kilometre that is 341 in Réunion (France) against 331 in Saga: Réunion (France) is 1.03× as densely populated.
Their centres are about 9,940 km apart.
On a standard web map Saga looks larger than Réunion (France): Réunion (France) at 21°S is drawn about 1.1× too large and Saga at 33°N about 1.4×, so the map shows Saga as 1.18× the size of Réunion (France), when Réunion (France) is 1.06× the size of Saga.
Together Réunion (France) and Saga cover 5,030 km², close to the size of Trinidad and Tobago (5,120 km², 1.9% bigger).
The gap between them, 135 km², is about the size of Liechtenstein (137 km²).
At Saga's density, Réunion (France) would have 855,000 people (it has 881,000). At Réunion (France)'s density, Saga would have 835,000 (it has 810,000).
Saga's centre is 54.4° of latitude, about 6,050 km, farther north than Réunion (France)'s.
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.
Saga is the 42nd largest of the 47 prefectures of Japan and covers 0.7% of its area; it is the 17th most densely populated of them.
Saga lies about 54° of latitude (roughly 6,050 km) north of Réunion (France), on the other side of the equator.
Shared out evenly, each person in Réunion (France) would have about 2,930 m² and each person in Saga about 3,020 m².
Laid side by side, Réunion (France) and Saga would cover 5,030 km², about the same size as Trinidad and Tobago.
Together they have 1.7 million people, 92% as many people as North Macedonia.
Saga is drawn from 74 points: at a size under 2,500 km² the outline is a sketch, so the overlap shows the proportions rather than the exact shape.

Side by side

	Réunion (France)	Saga
Is a	Overseas regionFrance	PrefectureJapan
Area, measured	2,580 km²997 mi²	2,450 km²945 mi²
Official area	2,510 km²Wikidata	2,440 km²Wikidata
Rank by area	15th of 18in France	42nd of 47in Japan
Population	881,000Wikidata, 2022	810,000Wikidata, 2021
Rank by population	13th of 18in France	41st of 47in Japan
Density	341 per km²	331 per km²
Capital	Saint-Denis	Saga
Latitude range	21°S to 21°S	33°N to 34°N

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

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.
Wikidata's official figure of 2,440 km² agrees with our measured area of 2,450 km², to within 2%.

Similar in size to Réunion (France)

Similar in size to Saga

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