Lake Ontario

Lake Ontario Basin Statistics

  • Length: 193 mi / 311 km
  • Breadth: 53 mi / 85 km
  • Elevation: 243.3 ft / 74.2 m
  • Depth: 283 ft / 86 m average, 802 ft / 244 m maximum
  • Volume: 393 cubic mi / 1,639 cubic km
  • Water Surface Area: 7,340 square mi / 19,009 square km
  • Drainage Basin Area: 23,400 square mi / 60,601 square km
  • Shoreline Length: 712 mi / 1,146 km (including islands)
  • Outlet: St. Lawrence River to the Atlantic Ocean
  • Retention / Replacement Time: 6 years
  • Population: United States, ~2,856,360 / Canada ~2,835,818. Total ~5,692,178