英国的水库在节约用水方面发挥着重要作用，有些也是很受欢迎的休闲运动。水库是为储存水而建造的人造湖或水体。水库的建设可以通过在河流上建造水坝或转移从湖中流出的水来进行。在 19 世纪，英国建造的水库数量激增，如今整个英国约有 570 座。
位于英格兰的拉特兰水库(Rutland Reservoir)是英国面积最大的水库，基尔德水库（Kielder Water），是英国水量最大的水库。
以下是英格兰和威尔士水库按水量容积的排名。您也可以点击表格上的排名，名称，所在地区，建造年，容积或面积来排序。
位于英格兰的拉特兰水库(Rutland Reservoir)是英国面积最大的水库，基尔德水库（Kielder Water），是英国水量最大的水库。
以下是英格兰和威尔士水库按水量容积的排名。您也可以点击表格上的排名，名称，所在地区，建造年，容积或面积来排序。
| 排名 | 名称 | 所在地区 | 建造年 | 容积（立方米） | 面积（平方米） |
|---|---|---|---|---|---|
| 排名 | 名称 | 所在地区 | 建造年 | 容积（立方米） | 面积（平方米） |
| 1 | Kielder Water | Northumberland | 1981 | 199,000,000 | 10,860,000 |
| 2 | Rutland Water | Rutland | 1976 | 124,000,000 | 12,600,000 |
| 3 | Haweswater | Cumbria | 1935 | 84,840,000 | 3,900,000 |
| 4 | Llyn Celyn | Gwynedd | 1965 | 80,930,850 | 3,300,000 |
| 5 | Llyn Brianne | Powys | 1972 | 64,400,000 | 2,096,000 |
| 6 | Llyn Brenig | Denbighshire | 1976 | 61,500,000 | 3,725,000 |
| 7 | Lake Vyrnwy | Powys | 1888 | 59,700,000 | 4,536,000 |
| 8 | Grafham Water | Cambridgeshire | 1965 | 57,800,000 | 6,280,000 |
| 9 | Llyn Clywedog | Powys | 1967 | 49,940,000 | 2,490,000 |
| 10 | Cow Green Reservoir | Teesdale | 1971 | 40,914,000 | 3,120,000 |
| 11 | Thirlmere | Cumbria | 1894 | 40,714,999 | 3,290,000 |
| 12 | Claerwen | Powys | 1952 | 40,307,000 | 2,630,000 |
| 13 | Derwent Reservoir | County Durham | 1965 | 40,060,000 | 405,000 |
| 14 | Roadford Lake | Devon | 1989 | 36,910,000 | 2,987,000 |
| 15 | Caban Coch | Powys | 1904 | 35,531,000 | 2,023,000 |
| 16 | Llyn Trawsfynydd | Gwynedd | 1928 | 33,190,000 | 4,800,000 |
| 17 | Nant-y-moch Reservoir | Ceredigion | 1964 | 32,564,000 | 2,630,000 |
| 18 | Queen Mother Reservoir | Greater London | 1976 | 31,492,000 | 1,922,000 |
| 19 | Bewl Water | Kent | 1975 | 31,000,000 | 3,120,000 |
| 20 | Queen Mary Reservoir | Greater London | 1931 | 30,363,000 | 2,863,000 |
| 21 | Colliford Lake | Cornwall | 1983 | 29,100,000 | 3,660,000 |
| 22 | Ladybower Reservoir | Derbyshire | 1943 | 27,800,000 | 2,100,000 |
| 23 | Hanningfield Reservoir | Essex | 1957 | 27,721,000 | 3,536,000 |
| 24 | Wraysbury Reservoir | Greater London | 1970 | 26,910,000 | 2,023,000 |
| 25 | Abberton Reservoir | Essex | 1939 | 25,721,000 | 4,900,000 |
| 26 | Llandegfedd Reservoir | Monmouthshire | 1965 | 24,660,000 | 1,760,445 |
| 27 | Draycote Water | Warwickshire | 1969 | 22,730,000 | 2,430,000 |
| 28 | Grimwith Reservoir | North Yorkshire | 1983 | 22,200,000 | 1,500,000 |
| 29 | Wimbleball Lake | Somerset | 1979 | 21,541,000 | 1,620,000 |
| 30 | Chew Valley Lake | Somerset | 1956 | 20,457,000 | 4,856,000 |
| 31 | Balderhead Reservoir | County Durham | 1961 | 19,618,000 | 1,170,000 |
| 32 | King George VI Reservoir | Greater London | 1947 | 18,732,000 | 1,420,000 |
| 33 | Blithfield Reservoir | Staffordshire | 1953 | 18,172,000 | 3,190,000 |
| 34 | Pitsford Water | Northamptonshire | 1956 | 17,545,000 | 3,030,000 |
| 35 | Queen Elizabeth II Reservoir | Greater London | 1962 | 16,809,000 | 1,283,000 |
| 36 | William Girling Reservoir | Greater London | 1951 | 16,500,000 | 1,350,000 |
| 37 | Pontsticill Reservoir | Powys | 1927 | 15,640,000 | 1,412,000 |
| 38 | Selset Reservoir | County Durham | 1960 | 15,320,000 | 1,110,000 |
| 39 | Alwen Reservoir | Conwy | 1921 | 14,564,200 | 1,490,000 |
| 40 | King George V Reservoir | Greater London | 1912 | 13,970,000 | 1,720,000 |
| 41 | Foremark Reservoir | Derbyshire | 1977 | 13,193,486 | 930,000 |
| 42 | Usk Reservoir | Powys | 1955 | 12,253,000 | 1,160,000 |
| 43 | Stocks Reservoir | Lancashire | 1932 | 12,006,000 | 1,390,000 |
| 44 | Talybont Reservoir | Powys | 1939 | 11,668,000 | 1,272,000 |
| 45 | Covenham Reservoir | Lincolnshire | 1972 | 10,900,000 | 882,000 |
| 46 | Catcleugh Reservoir | Northumberland | 1905 | 10,480,000 | 107,000 |
| 47 | Scar House Reservoir | North Yorkshire | 1936 | 10,069,000 | 700,000 |