Lake
Tonle Sap
Natural Earth’s outline of Tonle Sap measures about 2,540 km² (980 mi²), the 51st largest of the 104 lakes on sizeversus, and about the same size as Luxembourg.
20 km
- Luxembourg
- Tonle Sap
The numbers
- 2,540km²Area, measured980 mi² · Natural Earth outline
- 2,700km²Area, publishedWikidata · 6.0% above our measure, flagged
- 1.5mGreatest depthWikidata
- 2mAbove sea levelSurface, Wikidata
The area is measured from the outline drawn above, on the WGS84 ellipsoid; the published figure is shown beside it, and a water body is kept only if the two are within 10%. This one is between 5% and 10% apart, so it is flagged and no comparison is built for it automatically.
What the numbers say about Tonle Sap
- The Caspian Sea (called a sea or a lake, depending on the definition), the largest of the 104 lakes ranked on sizeversus, is 149× the size of Tonle Sap; Tonle Sap ranks 51st.
- Tonle Sap sits between Lake Frome (2,580 km²) and Wollaston Lake (2,420 km²) in the ranking.
- Counted as a country, Tonle Sap would be larger than 37 of the 212 countries listed on sizeversus and would rank 176th by area, between Luxembourg (2,610 km²) and Mauritius (2,000 km²).
- It is larger than 1 of the 51 US states and districts (the biggest of them is Washington, D.C., 162 km²) and smaller than 50.
- It is smaller than every one of the 31 provinces and regions of China.
- The closest US state is Rhode Island (2,830 km²): Tonle Sap is 90% of the size of Rhode Island.
- Wikidata records a greatest depth of 2 m.
- Its surface lies about 2 m above sea level (Wikidata).
- Tonle Sap lies at 13°N, close to the equator, where a standard web map (Web Mercator) is nearly true to size: it inflates area by only about 1.1×.
- Laid out flat, Tonle Sap stretches about 99 km north to south and 101 km east to west.
- Our measured 2,540 km² is 6.0% below Wikidata’s published figure of 2,700 km². This difference is flagged for review: a lake’s outline may include islands or bays that the published figure leaves out, or the water level may differ. The outline is kept because it is within 10%, and this page is not matched automatically to any other.
About the same size as
Countries
Chinese provinces
On the shore
Natural Earth’s outlines of Cambodia contain or lie within 4 km of the outline of Tonle Sap. That is what its geometry says, and it is not a statement about who owns the water or where any border runs in it.
Where Tonle Sap ranks
Tonle Sap is the 51st largest of the 104 lakes on sizeversus, ranked by measured area.
Share this outline
Sources and method
- Outline
- Natural Earth, 1:10m Lakes + Reservoirs, public domain (Lakes + Reservoirs). Outlines of lakes are drawn at 1:10 million.
- Boundary
- A lake or a sea has no legal boundary of its own. The outline is a cartographic one, and the page says so by showing the measured area beside the published one.
- Area basis
- Measured outline: computed on the WGS84 ellipsoid from the full-detail outline and shown rounded. Published figure: Wikidata (CC0), fetched 2026-11-11. An outline is kept within 10% of the published figure and matched to other places automatically within 5%.
- Depth, volume, height
- As recorded in Wikidata; a volume that cannot be right for the area and depth is left out.
- Shore
- Countries whose Natural Earth outline contains or comes close to the water's outline; computed, not a statement of ownership.
- Drawing
- Each outline is projected with an equal-area projection centred on its own centroid, so areas stay true and two can be laid over each other.
- Data built
- 2026-11-11