This list contains the lakes, tarns and reservoirs in the Lake District National Park in Cumbria, England.
Only one body of water, Bassenthwaite Lake, is traditionally named a lake. Larger bodies of water in the Lake District are generally named as mere or water, whilst smaller ones are denoted by tarn. Some writers, particularly in the media, refer to Lake Windermere though this use is deprecated.
Physical characteristics of the main lakes
This table gives details of those bodies of water with a surface area of at least 0.1 km².
{| class="sortable wikitable" style="width:100%"
! align="left" valign="bottom" | Name
! align="center" valign="bottom" | Length (km)
! align="center" valign="bottom" | Max. width (km)
! align="center" valign="bottom" | Mean depth (m)
! align="center" valign="bottom" | Trophic state index
|-
| Bassenthwaite Lake
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| align="right" valign="bottom" |
| align="right" valign="bottom" |
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| align="right" valign="bottom" |
| align="right" valign="bottom" |
| align="center" valign="bottom" |eutrophic
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| Blea Water
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| Blelham Tarn
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| align="center" valign="bottom" |eutrophic
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| Brotherswater
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| align="center" valign="bottom" |oligotrophic
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| Burnmoor Tarn
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| Buttermere
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| align="center" valign="bottom" |oligotrophic/mesotrophic
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| Cogra Moss
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| Coniston Water
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| align="right" valign="bottom" |
| align="center" valign="bottom" |mesotrophic/oligotrophic
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| Crummock Water
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| align="center" valign="bottom" |oligotrophic/mesotrophic
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| Derwent Water
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| align="right" valign="bottom" |
| align="center" valign="bottom" |mesotrophic
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| Devoke Water
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| Easedale Tarn
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| Elter Water
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| align="right" valign="bottom" |
| align="center" valign="bottom" |<small>outer basin: mesotrophic<br />middle basin: eutrophic<br />inner basin: hypereutrophic</small>
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| Ennerdale Water
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| align="center" valign="bottom" |oligotrophic/mesotrophic
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| Esthwaite Water
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| align="right" valign="bottom" |
| align="right" valign="bottom" |
| align="center" valign="bottom" |eutrophic/hypereutrophic
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| Grasmere
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| align="right" valign="bottom" |
| align="center" valign="bottom" |eutrophic
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| Grisedale Tarn
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| Haweswater
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| align="center" valign="bottom" |mesotrophic
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| Hayeswater
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| Kentmere Reservoir
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| Levers Water
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| Loweswater
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| align="right" valign="bottom" |
| align="center" valign="bottom" |mesotrophic
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| Over Water
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| Rydal Water
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| align="right" valign="bottom" |
| align="right" valign="bottom" |
| align="center" valign="bottom" |eutrophic/mesotrophic
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| Seathwaite Tarn
| align="right" valign="bottom" |
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| Tarn Hows
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| Thirlmere
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| align="right" valign="bottom" |
| align="center" valign="bottom" |oligotrophic
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| Ullswater
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| align="center" valign="bottom" |oligotrophic/mesotrophic
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| Wastwater
| align="right" valign="bottom" |
| align="right" valign="bottom" |
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| align="right" valign="bottom" |
| align="right" valign="bottom" |
| align="right" valign="bottom" |
| align="right" valign="bottom" |
| align="center" valign="bottom" |oligotrophic
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| Wet Sleddale Reservoir
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| Windermere
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| align="right" valign="bottom" |
| align="right" valign="bottom" |
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| align="right" valign="bottom" |
| align="right" valign="bottom" |
| align="right" valign="bottom" |
| align="right" valign="bottom" |
| align="center" valign="bottom" |slightly eutrophic
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| Windermere (north)
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| align="right" valign="bottom" |
| align="center" valign="bottom" |slightly eutrophic
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| Windermere (south)
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| align="right" valign="bottom" |
| align="center" valign="bottom" |slightly eutrophic
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|}
Map of major lakes
The map shows the locations of the lakes with a volume over 4 million m<sup>3</sup> and gives an indication of the volume of water in each lake. The markers suggest this by showing the size of a drop of water where the volume of the drop would be in proportion to the quantity of water in the lake (the diameter of the drop is proportional to the cube root of the lake's volume).
- Keppel Cove Tarn, north of Catstycam, dam destroyed by flood, 1931