Connecticut is 1.05× the size of Île-de-France

Connecticut (state of the United States) covers about 12,700 km² (4,910 mi²) and Île-de-France (region of France) about 12,100 km² (4,670 mi²). Below, both outlines are drawn at one scale and centred on each other.

12,700km²Connecticut
12,100km²Île-de-France

50 km

Connecticut
Île-de-France

What fits

Île-de-France is 95% of the size of Connecticut.
Connecticut is larger by 599 km² (231 mi²), which is 4.9% of the area of Île-de-France.
Measured in Belgiums: Connecticut is about 0.41, Île-de-France about 0.39.

How they differ

Connecticut is larger, but Île-de-France has the larger population: 12.4 million against 3.6 million, 3.43× as many people.
Per square kilometre that is 1,023 in Île-de-France against 284 in Connecticut: Île-de-France is 3.60× as densely populated.
Their centres are about 5,710 km apart.
On a standard web map Île-de-France looks larger than Connecticut: Connecticut at 42°N is drawn about 1.8× too large and Île-de-France at 49°N about 2.3×, so the map shows Île-de-France as 1.22× the size of Connecticut, when Connecticut is 1.05× the size of Île-de-France.
Together Connecticut and Île-de-France cover 24,800 km², close to the size of Rwanda (25,300 km², 2.0% bigger).
The gap between them, 599 km², is about the size of Tonga (603 km²).
At Île-de-France's density, Connecticut would have 13.0 million people (it has 3.6 million). At Connecticut's density, Île-de-France would have 3.4 million (it has 12.4 million).
Île-de-France's centre is 7.1° of latitude, about 790 km, farther north than Connecticut's.
Connecticut is the 48th largest of the 51 states and districts of the United States and covers 0.1% of its area; it is the 5th most densely populated of them.
Île-de-France is the 13th largest of the 18 regions of France and covers 1.9% of its area; it is the most densely populated of them.
Île-de-France lies about 7° of latitude (roughly 788 km) north of Connecticut.
Shared out evenly, each person in Connecticut would have about 3,520 m² and each person in Île-de-France about 980 m².
Laid side by side, Connecticut and Île-de-France would cover 24,800 km², about the same size as Rwanda.
Together they have 16.0 million people, 1.05× as many people as Zimbabwe.

Side by side

	Connecticut	Île-de-France
Is a	StateUnited States	RegionFrance
Area, measured	12,700 km²4,910 mi²	12,100 km²4,670 mi²
Official area	14,400 km²Wikidata	12,000 km²Wikidata
Rank by area	48th of 51in the United States	13th of 18in France
Population	3.6 millionWikidata, 2020	12.4 millionWikidata, 2022
Rank by population	29th of 51in the United States	1st of 18in France
Density	284 per km²	1,023 per km²
Capital	Hartford	Paris
Latitude range	41°N to 42°N	48°N to 49°N

Population: Wikidata 2020 and Wikidata 2022. Official figures: Wikidata (CC0).

Our measured 12,700 km² is 12% below Wikidata's official figure of 14,400 km². Official figures can include inland water or count land that an outline draws differently. This difference is flagged for review.
Wikidata's official figure of 12,000 km² agrees with our measured area of 12,100 km², to within 2%.

Similar in size to Connecticut

Similar in size to Île-de-France

More comparisons

Sources and method

Outlines: Natural Earth, 1:10m Admin 1 - States, Provinces, public domain. The outline of Île-de-France is the departments 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