Central NYS Watersheds (15.7M) County (Borough) Population Centres Rivers, Streams Lakes, Reservoirs Estuary              
Mohawk River                          
Montgomery, pop 49,221[1] Fonda (village) <5000
Schoharie County, pop 30,999[2] Schoharie (town) <5000 Schoharie Creek (1,650 river miles) Hinkley Reservoir (2,684 acres) Estuary Waters: 78,322 acres of estuary along the entire 153 mile length of the Lower Hudson.
Map of NYS identifying the Mohawk River Watershed
Schenectady, pop 155,299[3] Schenectady, pop 65, 273[4] West Canada Creek (1,165 miles) Delta Reservoir (2.376 acres)
Greene, pop 47,188[5] Catskill, (town) 11,334[6] East Canada Creek (515 miles) Peck Lake (1,426 acres)
Fulton, pop 53,383[7] Johnstown (city) 8230[8] Schoharie Reservoir (1,132 acres)
Herkimer, pop 61,319[9] Herkimer(Village), pop 7262[10]
Oneida, pop 228,671[11] Utica, pop 59,750[12]
Smaller parts of Albany, Saratoga, Delaware, 
Otsego, Hamilton, Madison and Lewis Counties.
https://www.dec.ny.gov/lands/48041.html
Mohwak River Watershed Plan (Outside Link)
Population in Mohawk River Watershed 626080
Upper Hudson River                          
Saratoga, pop 229,863[13] Saratoga Springs, pop 28, 212[14] Sacandaga River (1,740 river/stream miles) Great Sacandaga Lake (26,800 lake/reservoir acres)
Map of NYS identifying the Upper Hudson River Watershed
Washington, pop 61,204[15] Schroon River (822 miles) Indian Lake (4,465 acres)
Warren pop 63,944[16] Glens Falls, pop 14,262[17] Fish Creek (551 miles) Schroon Lake (4,130 acres)
Essex, pop 36,885[18] Hoosic River (533 miles) Saratoga Lake (4,030 acres)
Hamilton, pop 4416[19] Batten Kill (334 miles)
Portions of northern Rensselaer and northeastern Fulton Counties.
Small parts of Greene and Chenango Counties.
https://www.dec.ny.gov/lands/48019.html
Population in Upper Hudson River Watershed 396312
Lower Hudson River                          
Rondout/Wallkill Rivers (1,584 river/stream miles) Ashokan Reservoir (8,060 lake/reservoir acres)
Map of NYS identifying the Lower Hudson River Watershed
Putnam, pop 98,890[20] Stockport/Kinderhook Creeks (1,077 miles) Rondout Reservoir (2,024 acres)
Orange, pop 384,940[21] Catskill Creek (927 miles) New Croton Reservoir (1,949 acres)
Ulster, pop 177,573[22] Kingston, pop 22,793[23]
Columbia, pop 59, 461[24]
Albany, pop 305,506[25] Albany (1686), pop 96,460