| Lake | County | Latitude | Longitude |
| Ida Lake | Rensselaer | 42.719828 | -73.672562 |
| Ilion Reservoir No 1 | Herkimer | 42.992815 | -75.054997 |
| Ilion Reservoir No 2 | Herkimer | 42.986936 | -75.067570 |
| Ilion Reservoir No 3 | Herkimer | 42.986108 | -75.028204 |
| Independence Lake | Herkimer | 43.772461 | -74.979097 |
| Indian Brook | Herkimer | 43.711989 | -75.014889 |
| Indian Brook Reservo | Westchester | 41.192732 | -73.862880 |
| Indian Reservoir | Orange | 41.239560 | -74.210052 |
| Indigo Lake | Hamilton | 43.368979 | -74.647923 |
| Ireland Valley | Saratoga | 43.154384 | -74.019372 |
| Iron Lake | Hamilton | 43.312386 | -74.595480 |
| Iroquois Lake | Schenectady | 42.799676 | -73.911617 |
| Irvington Resv | Westchester | 41.035797 | -73.851103 |
| Island Swamp Brook | Nassau | 40.889749 | -73.619021 |
| Ithaca Reservoir | Tompkins | 42.414235 | -76.459012 |