Lakes of Zug 2026: 4, the biggest shared with 2 cantons

Lake Zug isn't Zug's alone. Which lake is? ↓

Lake Zug bears the canton's name, but Zug shares it with Schwyz and Lucerne. The lake Zug owns alone is the Ägerisee, at 724 m, 7.28 km².

Number of lakes in Zug: 4

4 lakes of half a hectare or more, and yet the national map shows 110 bodies of standing water in Zug. The gap is not imprecision; it is a way of counting.

Anyone reading a different figure has almost always drawn a different line: count every water surface and Zug has 110; count only lakes over one square kilometre and you get 2. Even a plain name such as "Weiher" counts as official: what decides is the entry in the swissNAMES3D gazetteer. Our count states where the line is, so it can be checked.

Lake Finder: find any lake in Zug

Largest lake in Zug: Ägerisee

The largest lake touching Zug is the Zugersee (38.4 km²), but only 63% of its surface lies in the canton. The largest lake belonging entirely to the canton is the Ägerisee: 7.28 km² at 724 m.

Highest lake in Zug: Wilersee

Even the highest lake in Zug lies lower than 73% of Swiss lakes: the Wilersee in Menzingen at 729 m, 3.3 ha.

The canton's lowest-lying lake is the Zugersee at 414 m. The canton's median lake sits at 574 m. Elevation is the water level in the landscape model; for reservoirs it varies with how full they are.

Shared lakes: which lakes Zug shares

77% of the lake surface in Zug lies in lakes it does not own alone. Zug shares 1 of its 4 lakes with other cantons; the table shows how much of each lies in the canton.

List of lakes in Zug

The list shows all 4 officially named bodies of water in the canton, by area. The 4 lakes of half a hectare or more come first; smaller ponds are marked.

Lakes by size: 2 of 4 under 5 ha

2 of the 4 lakes in Zug are smaller than five hectares. 2 are larger than ten hectares, which puts Zug at rank 18 of the 26 cantons.

Lakes over ten hectares thus make up 50%, against 20% across Switzerland.

More lake pages

Written by

Marco Gisler

ConvivaPlus Editor · Data & Switzerland

Writes about Switzerland in figures – official data recalculated, counting method explained.

• Population
• 26 cantons
• Waterways
• Official data

Researched & sourced · for Switzerland

Profile & all articles →·Our editorial teamUpdated 25.10.2026

Source: swisstopo (swissTLM3D, swissNAMES3D, swissBOUNDARIES3D, 2026 edition), analysis by ConvivaPlus. Switzerland as a whole: 891 lakes out of 17'873 water surfaces; parts with the same name no more than 50 m apart count as one lake. Area = water surface at the shoreline of the landscape model; reference works using a different shoreline or water level sometimes give other values.