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| Lake Name (short) | Lake Name (in full) | Country |
|---|---|---|
| Kairakkumskoye | Kairakkumskoye Reservoir | Tajikistan |
| Kakhovskoye | Kakhovskoye Reservoir | Ukraine |
| Kamafusa | Kamafusa Reservoir | Japan |
| Kamburu | Kamburu Reservoir | Kenya |
| Kamloops | Kamloops Lake | Canada |
| Kamskoye | Kamskoye Reservoir | Russia |
| Kanevskoye | Kanevskoye Reservoir | Ukraine |
| Kanhargaov | Kanhargaov Reservoir | India |
| Kaoyu | Lake Kaoyu | China |
| Kaptchagayskoye | Kaptchagayskoye Reservoir | Kazakhstan |
| Kariba | Lake Kariba | Zambia / Zimbabwe |
| Kasba | Kasba Lake | Canada |
| Kasumigaura | Lake Kasumigaura | Japan |
| Kawaguchi | Lake Kawaguchi | Japan |
| Keban Dam | Keban Dam Reservoir | Turkey |
| Kejimkujik | Kejimkujik Lake | Canada |
| Kenyir | Kenyir Reservoir | Malaysia |
| Ketelmeer | Ketelmeer | Netherlands |
| Keuka | Keuka Lake | USA |
| Kezar | Kezar Lake | USA |
| Khanka | Lake Khanka ( Xingkai ) | China / Russia |
| Khantayskoye | Khantayskoye | Russia |
| Kievskoye | Kievskoye Reservoir | Ukraine |
| Kimbere | Kimbere Reservoir | Kenya |
| Kindaruma | Kindaruma Reservoir | Kenya |
| Kinneret | Lake Kinneret ( Galilee ) | Israel |
| Kisajno | Kisajno | Poland |
| Kivu | Lake Kivu | Congo ( Dem. Rep. ) / Rwanda |
| Kivumba | Lake Kivumba | Rwanda |
| Kizaki | Lake Kizaki | Japan |
| Knyazhegubskoye | Knyazhegubskoye Reservoir ( Kovd ) | Russia |
| Kojima | Lake Kojima | Japan |
| Koka | Lake Koka | Ethiopia |
| Kolleru | Lake Kolleru | India |
| Kootenay | Kootenay Lake | Canada |
| Krasnoyarskoye | Krasnoyarskoye Reservoir | Russia |
| Krementchugskoye | Krementchugskoye Reservoir | Ukraine |
| Kulundinskoye | Kulundinskoye | Russia |
| Kurisches Bay | Kurisches Bay | Lithuania / Russia |
| Kurunegala | Kurunegala Reservoir | Sri Lanka |
| Kuybyshevskoe | Kuybyshev Reservoir ( Samara Reservoir ) | Russia |
| Kyaring | Lake Kyaring | China |
| Kyoga | Lake Kyoga | Uganda |