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Castile and León vs Indiana: size comparison

Castile and León and Indiana are almost exactly the same size: 36,378 sq mi (94,218 km²) and 36,421 sq mi (94,331 km²). Indiana is just 0.1% bigger. Here you can see both overlaid at their true size, with their population, density and end-to-end distance.

By the Mapsfera Team

Map of Indiana on top of Castile and León at true size

1.00× Almost the same size: 0.1% apart

  • Castile and León 36,378 sq mi below, in its real place
  • Indiana 36,421 sq mi on top, centered on Castile and León
Move them in “True size map”

Drag both across a Mercator map and watch how they change with latitude.

Lambert azimuthal equal-area projection centered on Castile and León: it preserves areas, so both appear in their true proportion. Indiana has been rotated across the globe, without changing its shape or size, until its center sits on the center of Castile and León.

The figures

Figure Castile and León Indiana
Area 36,378 sq mi 94,218 km² · Spain’s IGN 36,421 sq mi 94,331 km² · US Census Bureau
Population 2.4 million INE, 2025 7.0 million Census, 2025
Density 66 per sq mi 25 per km² 191 per sq mi 74 per km²
End to end about 290 mi (460 km) about 320 mi (520 km)
Size rank 1st of 17 communities 38th of 50 states
Mercator enlarges it ×1.8 centered at 42° N ×1.7 centered at 40° N

Which is bigger, Castile and León or Indiana?

Castile and León is the largest autonomous community in Spain and one of the most extensive regions in the European Union; Indiana is the smallest state in the US Midwest. Few pairs of a European region and a US state match this closely.

The difference is only 43.6 sq mi (113 km²).

Indiana is the 38th-largest US state.

Population and density

Castile and León has a population of 2.4 million (Spain’s INE, population register on January 1, 2025) and Indiana 7.0 million (US Census Bureau, July 1, 2025 estimate).

That’s 66 per sq mi (25 per km²) in Castile and León and 191 per sq mi (74 per km²) in Indiana: Indiana has 2.90 times as many people per square mile as Castile and León.

Why they look different on a regular world map

On the Mercator projection, used by Google Maps and many world maps, everything gets bigger the farther it is from the equator. Castile and León, centered at 42° N, comes out 1.8 times bigger than it really is overall; Indiana, at 40° N, 1.7 times.

That’s why on those maps Castile and León looks a little bigger than Indiana (1.06 times the space on paper), even though they are almost the same size.

That doesn’t happen on the map on this page: it uses an equal-area projection centered on Castile and León. To move them across a Mercator map yourself, open them in the True size map.

From end to end

The longest straight line between two points of Castile and León is about 290 mi (460 km), running southwest to northeast; for Indiana it’s about 320 mi (520 km), southwest to northeast.

End to end, Indiana is 13% longer than Castile and León.

Frequently asked questions

Is Castile and León bigger than Indiana?

No, by a hair. Castile and León covers 36,378 sq mi (94,218 km²) and Indiana 36,421 sq mi (94,331 km²): Indiana is 0.1% bigger.

How much bigger is Indiana than Castile and León?

0.1%: 43.6 sq mi (113 km²) more, out of 36,378 sq mi (94,218 km²). Overlaid, you can barely tell.

Which has more people, Castile and León or Indiana?

Indiana: 7.0 million people versus 2.4 million (2.91 times as many). Per square mile, 66 per sq mi (25 per km²) in Castile and León and 191 per sq mi (74 per km²) in Indiana.

Which US state is about the size of Castile and León?

Maine (35,380 sq mi) and Kentucky (40,406 sq mi) are the states closest in area to Castile and León, which covers 36,378 sq mi (94,218 km²).

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Sources