Great Slave Lake is 1.02× the size of Maryland

Great Slave Lake (lake) covers about 26,100 km² (10,100 mi²) and Maryland (state) about 25,500 km² (9,830 mi²). Below, both outlines are drawn at one scale and centred on each other. The Great Slave Lake outline is Natural Earth’s, checked against the published area.

26,100km²Great Slave Lake
25,500km²Maryland

100 km

Great Slave Lake
Maryland

What fits

Maryland is 98% of the size of Great Slave Lake.
Great Slave Lake is larger by 633 km² (244 mi²), which is 2.5% of the area of Maryland.
Measured in Belgiums: Great Slave Lake is about 0.85, Maryland about 0.83.

How they differ

Their centres are about 3,560 km apart.
A standard web map misstates the comparison: Great Slave Lake at 62°N is drawn about 4.5× too large and Maryland at 39°N about 1.7×, so the map shows Great Slave Lake as 2.75× the size of Maryland instead of 1.02×.
Together Great Slave Lake and Maryland cover 51,600 km², close to the size of Bosnia and Herzegovina (51,800 km², 0.5% bigger).
The gap between them, 633 km², is about the size of Micronesia (634 km²).
Great Slave Lake's centre is 22.7° of latitude, about 2,520 km, farther north than Maryland's.
Great Slave Lake is a lake and ranks 10th of the 104 lakes on sizeversus by area.
Maryland is a state of the United States; it is not drawn with its waters removed, and its measured area is the Natural Earth outline's.
Laid out flat, Great Slave Lake stretches about 222 km north to south and 417 km east to west; Maryland about 202 km by 384 km.
Poured over Maryland, the 1,580 km³ that Wikidata records for Great Slave Lake would stand 62 m deep.
Our measured 26,100 km² is 4.1% below Wikidata’s published figure of 27,200 km². Published areas of lakes and seas move with the water level and with what is counted, so a few percent is expected.

Who wins on what

Measure	Winner	By
Larger area	Great Slave Lake	1.02×
Farther north	Great Slave Lake	22.7° of latitude
Stretched more on a web map	Great Slave Lake	4.5× against 1.7×

Both against the same yardsticks

Yardstick	Great Slave Lake	Maryland
Belgium 30,700 km²	0.85×	0.83×
United Kingdom 244,000 km²	0.11×	0.10×
Germany 358,000 km²	0.07×	0.07×
Japan 374,000 km²	0.07×	0.07×
France 548,000 km²	0.05×	0.05×
India 3,151,000 km²	0.01×	0.01×
Brazil 8,473,000 km²	1 in 325	1 in 333
United States 9,447,000 km²	1 in 362	1 in 371
Russia 16,980,000 km²	1 in 651	1 in 667

Each figure is the place's area divided by the yardstick's.

Side by side

	Great Slave Lake	Maryland
Is a	Lakelake on sizeversus	StateUnited States
Area, measured	26,100 km²10,100 mi²	25,500 km²9,830 mi²
Area, published	27,200 km²Wikidata	32,100 km²Wikidata
Rank by area	10th of 104lakes	–
Greatest depth	614 mWikidata	–
Volume	1,580 km³	–
Latitude range	61°N to 63°N	38°N to 40°N
On the shore	1 on the shore	–

Published figures: Wikidata (CC0). A lake or a sea has no legal boundary: the measured area is that of Natural Earth’s outline, and it is shown beside the published one.

Natural Earth’s outlines of Canada contain or lie within 4 km of the outline of Great Slave Lake. That is what its geometry says, and it is not a statement about who owns the water or where any border runs in it.

Similar in size to Great Slave Lake

Similar in size to Maryland

More comparisons

Sources and method

Outlines: Lakes and seas: Natural Earth 1:10m physical vectors (public domain), kept only where the measured area is within 10% of the published one. Countries and regions: Natural Earth, 1:10m Admin 0 and Admin 1, public domain.
Boundary: De facto, as drawn by Natural Earth. A lake or a sea has no legal boundary of its own; the outline is a cartographic one.
Area: Measured on the WGS84 ellipsoid from the full-detail outlines, shown rounded. The published figure comes from Wikidata (CC0), fetched 2026-11-11, and is shown beside the measured one.
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: 2026-11-11

Full method