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Cornwall is a city of about 48,000 people (2018) on the St. Lawrence River in Eastern Ontario.


Cornwall is on the St. Lawrence Seaway, opposite Massena and Rooseveltown, New York. The 1958 seaway eliminated rapids upstream at Long Sault, opening a path for large ocean-going vessels from the Great Lakes at the expense of inundating and destroying several small villages (such as Aultsville and Moulinette). Some historic buildings which were displaced from the Lost Villages are now at Morrisburg (Upper Canada Village) or Long Sault (Ault Park); islands along what is now the Long Sault Parkway were once part of the Canadian mainland. Long Sault and Ingleside are planned communities to house displaced villagers.

Cornwall-Massena is the home of a large hydroelectric generating station (with visitor's centre) and large ships may be viewed transiting the Seaway locks. Much of the city's industrial base is now gone, as is the pollution associated with Cornwall-Massena in the 1970s.

Get in[edit]

By car[edit]

Cornwall is on Highway 401 (exit 789), about one hour west of Montreal and two hours east of Kingston. As Ontario's easternmost city, Cornwall appears as a control city on highway signage for over a 160 km (100 miles) from Kingston (exit 611) eastward.

From Montréal, Autoroute 20 west becomes Ontario 401.

From Ottawa-Hull, take the Trans-Canada Highway 417 to Casselman, then turn south on Ontario 138.

By train[edit]

VIA Rail serves Cornwall from Montreal and Toronto. The railway station is located at 1650 Station Rd.

By bus[edit]

Megabus (Coach Canada) serves Cornwall from Montreal and Toronto.

By plane[edit]

The closest major airport is Montréal-Trudeau YUL IATA, from which direct onward connections are available by rail from the Dorval commuter train station. Ottawa also has a major airport, but Ottawa-Cartier (YOW IATA) is no closer than Montréal and lacks Dorval's relatively easy air-to-rail connection.

There is a tiny airport in Massena with a few federally-subsidised US flights daily to Albany.

By seaway[edit]

Cruising on small craft is an option on the St. Lawrence Seaway, but there is a minimum length at the locks (about 20 ft, which excludes some small boats which can be carried by auto trailers) and the huge "Seaway Max" ships are given priority - one of these leviathans fills an entire Seaway lock with only inches to spare.

As the Seaway is fresh water and the Cornwall-Massena border is 45°N (halfway to the North Pole), shipping through the locks is inherently seasonal, typically ending in December and re-opening near the end of March.

  • Long Sault Marina, Hwy 2, Long Sault (on shore of Rob's Bay), +1 613-534-2113. May-November: 8AM-7PM. Marina and boat launch, restaurant and patio with seafood, Montréal smoked meat.

By horse[edit]

Get around[edit]


Cornwall Jail. Do not pass GO, do not collect $200
  • Historic Cornwall Jail, 11 Water St. W., +1 613-938-4748. A working jail from 1833-2002, now a prison museum.
  • Inverarden House, 3332 Montreal Rd.. Former museum (closed since 2000). Parks Canada owns this national historic site, the Regency architecture retirement home of John McDonald of the North West Company, but has not reopened it to the public.
  • Lost Villages Museum, Ault Park, Fran Laflamme Drive, Long Sault. Ten restored and relocated heritage buildings from The Lost Villages and surrounding townships, including former Moulinette rail station. By donation..
  • TAG: The Art Gallery of Cornwall, 168 Pitt St., +1 613-938-7387. W 10AM-5PM.
  • United Counties Museum (Cornwall Community Museum), Wood House, 160 Water St. W., +1 613-936-0842. Local history museum in relocated 1840s house, archives, classroom and exhibit space. Free, year-round..



  • Cornwall Square, 1 Water Street East. Downtown shopping complex near Lamoureux Park waterfront.
  • Long Sault Farmers Market, in front of Long Sault Plaza. June-early Oct: F 2PM-6PM. Local produce in season.



Ontario's drinking age, at 19, is high by Montréal standards (Québec is 18) but almost looks reasonable next to Massena (USA is 21).




Bed and breakfast[edit]


  • 1 Long Sault Parkway, On Hwy 2, between Morrisburg and Cornwall, 401 exits 770 and 778. Provincial park on 11 islands created by Seaway flooding. Campgrounds on Mille Roches, Woodlands, McLaren; beach and picnic areas on Mille Roches and Woodlands. Long Sault Parkway (Q17108972) on Wikidata Long Sault Provincial Park on Wikipedia


Open Wi-Fi is also available at ONroute (401 westbound rest stop at the provincial border) and McDonald's (hamburger stand with two Cornwall locations).




  • 1 Martintown Grist Mill, Dundas Street (CR 18 & 20), Martintown. Four-storey 1846 stone mill building on the banks of the Raisin River; farmers' market on summer Sundays.

St. Andrews[edit]


Go next[edit]

  • Morrisburg is home to Upper Canada Village, a pioneer village living museum which preserves various historic buildings displaced by Seaway flooding in the 1950s, and a park commemorating the Battle of Cryslers Farm in the War of 1812.
Routes through Cornwall
KingstonBrockville  W VIA Rail Toronto Montreal icon.png E  DorvalMontreal
KingstonMorrisburg  W Ontario 401.svg E  → Becomes Quebec Autoroute 20.svgSalaberry-de-ValleyfieldMontreal

This city travel guide to Cornwall is a usable article. It has information on how to get there and on restaurants and hotels. An adventurous person could use this article, but please feel free to improve it by editing the page.