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| Lake Name (short) | Lake Name (in full) | Country |
|---|---|---|
| Paajarvi | Lake Paajarvi | Finland |
| Paanajarvi | Lake Paanajarvi | Russia |
| Paijanne | Lake Paijanne | Finland |
| Panchet Reservoir | Panchet Reservoir | India |
| Pangong | Lake Pangong | China / India |
| Parakrama | Lake Parakrama | Sri Lanka |
| Patos | Patos Lagoon | Brazil |
| Patzcuaro | Lake Patzcuaro | Mexico |
| Peipsi | Lake Peipsi ( Chudskoe ) | Estonia / Russia |
| Peipus | Lake Peipus ( Chudsko-Pskov/Peipsi-Pihkva ) | Estonia / Russia |
| Pellegrini | Pellegrini | Argentina |
| Phewa | Lake Phewa | Nepal |
| Piedra Del Aguila | Piedra Del Aguila Reservoir | Argentina |
| Pielinen | Lake Pielinen | Finland |
| Pipmuacan | Pipmuacan | Canada |
| Piso | Lake Piso | Liberia |
| Plitvice | Plitvice Lakes | Croatia |
| Poechos | Poechos Reservoir | Peru |
| Pomo | Lake Pomo | China |
| Pontchartrain | Lake Pontchartrain | USA |
| Poopo | Lake Poopo | Bolivia |
| Porto Primavera | Porto Primavera Reservoir | Brazil |
| Powai Lake | Powai Lake | India |
| Poyang | Poyang Lake | China |
| Prespa | Lake Prespa | Albania / Greece / Macedonia |
| Proletarskoye | Proletarskoye Reservoir | Russia |
| Promissao | Promissao Reservoir | Brazil |
| Puelo | Puelo Lake | Argentina |
| Pulicat Lake | Pulicat Lake | India |
| Pyasino | Pyasino | Russia |
| Pyramid | Pyramid Lake | USA |