page_title: Ottawa
section_title: Geography
hierarchical_section_title: Ottawa / Geography
caption_attribution_description: Downtown Ottawa, parts of Gatineau, Quebec and the Ottawa River, as viewed from a hot air balloon.
context_page_description: Ottawa is the capital city of Canada. It stands on the south bank of the Ottawa River in the eastern portion of southern Ontario. Ottawa borders Gatineau, Quebec, and forms the core of the Ottawa–Gatineau census metropolitan area and the National Capital Region. As of 2016, Ottawa had a city population of 934,243 and a metropolitan population of 1,323,783 making it the fourth-largest city and the fifth-largest CMA in Canada. In June 2019, the City of Ottawa estimated it had surpassed a population of a million.
  Founded in 1826 as Bytown, and incorporated as Ottawa in 1855, the city has evolved into the political centre of Canada. Its original boundaries were expanded through numerous annexations and were ultimately replaced by a new city incorporation and amalgamation in 2001 which significantly increased its land area. The city name "Ottawa" was chosen in reference to the Ottawa River, the name of which is derived from the Algonquin Odawa, meaning "to trade".
context_section_description: Ottawa is on the south bank of the Ottawa River and contains the mouths of the Rideau River and Rideau Canal. The older part of the city (including what remains of Bytown) is known as Lower Town, and occupies an area between the canal and the rivers. Across the canal to the west lies Centretown and Downtown Ottawa, which is the city's financial and commercial hub and home to the Parliament of Canada and numerous federal government department headquarters, notably the Privy Council Office. On 29 June 2007, the Rideau Canal, which stretches 202 km (126 mi) to Kingston, Fort Henry and four Martello towers in the Kingston area, was recognized as a UNESCO World Heritage Site.
  Located within the major, yet mostly dormant Western Quebec Seismic Zone, Ottawa is occasionally struck by earthquakes. Examples include the 2000 Kipawa earthquake, a magnitude-4.5 earthquake on 24 February 2006, the 2010 Central Canada earthquake, and a magnitude-5.2 earthquake on 17 May 2013.
  Ottawa sits at the confluence of three major rivers: the Ottawa River, the Gatineau River and the Rideau River. The Ottawa and Gatineau rivers were historically important in the logging and lumber industries and the Rideau as part of the Rideau Canal system for military, commercial and, subsequently, recreational purposes. The Rideau Canal (Rideau Waterway) first opened in 1832 and is 202 km (126 mi) long. It connects the Saint Lawrence River on Lake Ontario at Kingston to the Ottawa River near Parliament Hill. It was able to bypass the unnavigable sections of the Cataraqui and Rideau rivers and various small lakes along the waterway due to flooding techniques and the construction of 47 water transport locks.The Rideau River got its name from early French explorers who thought the waterfalls at the point where the Rideau River empties into the Ottawa River resembled a "curtain". Hence they began naming the falls and river "rideau" which is the French equivalent of the English word for curtain. During part of the winter season the Ottawa section of the canal forms the world's largest skating rink, thereby providing both a recreational venue and a 7.8 km (4.8 mi) transportation path to downtown for ice skaters (from Carleton University and Dow's Lake to the Rideau Centre and National Arts Centre).
  Across the Ottawa River, which forms the border between Ontario and Quebec, lies the city of Gatineau, itself the result of amalgamation of the former Quebec cities of Hull and Aylmer together with Gatineau. Although formally and administratively separate cities in two separate provinces, Ottawa and Gatineau (along with a number of nearby municipalities) collectively constitute the National Capital Region, which is considered a single metropolitan area. One federal crown corporation, the National Capital Commission, or NCC, has significant land holdings in both cities, including sites of historical and touristic importance. The NCC, through its responsibility for planning and development of these lands, is an important contributor to both cities. Around the main urban area is an extensive greenbelt, administered by the NCC for conservation and leisure, and comprising mostly forest, farmland and marshland.
caption: Downtown Ottawa is situated on the south bank of the Ottawa River. Gatineau may be seen in the background, across the river.
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