Les Collines-de-l'Outaouais Regional County Municipality
Regional county municipality in Quebec, Canada
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Les Collines-de-l'Outaouais (French pronunciation: [le kɔlin də lutawɛ], "The hills of the Outaouais") is a regional county municipality in the Outaouais region of western Quebec, Canada. The region nearly encircles the City of Gatineau, which is to the south. Its administrative seat is in Chelsea, Quebec.
Les Collines-de-l'Outaouais | |
|---|---|
| Coordinates: 45°33′N 75°52′W[1] | |
| Country | |
| Province | |
| Region | Outaouais |
| Effective | December 4, 1991 |
| County seat | Chelsea |
| Government | |
| • Type | Prefecture |
| • Prefect | Marc Carriere |
| Area | |
• Total | 2,199.30 km2 (849.15 sq mi) |
| • Land | 1,912.05 km2 (738.25 sq mi) |
| Population (2021)[3] | |
• Total | 53,657 |
| • Density | 28.1/km2 (73/sq mi) |
| • Change 2016-2021 | |
| • Dwellings | 24,627 |
| Time zone | UTC−5 (EST) |
| • Summer (DST) | UTC−4 (EDT) |
| Area code | 819 |
| Website | www |
| [4] | |
It was created in January 1991 when the Communauté régionale de l'Outaouais (Outaouais Regional Community) was split into Les Collines-de-l'Outaouais RCM and the Communauté urbaine de l'Outaouais (Outaouais Urban Community, now City of Gatineau). The region is home to the majority of Gatineau Park. It is bisected by the Gatineau River which flows from north to south. The Ottawa River forms the southwestern boundary.
Subdivisions
There are six subdivisions within the RCM:[2]
- Municipalities (6)

Demographics
| 2021 | 2016 | 2011 | |
|---|---|---|---|
| Population | 54,498 (+11.0% from 2016) | 49,094 (5.8% from 2011) | 46,393 (10.4% from 2006) |
| Land area | 2,025.38 km2 (782.00 sq mi) | 2,051.77 km2 (792.19 sq mi) | 2,048.24 km2 (790.83 sq mi) |
| Population density | 26.9/km2 (70/sq mi) | 23.9/km2 (62/sq mi) | 22.7/km2 (59/sq mi) |
| Median age | 42.0 (M: 42.4, F: 41.6) | 41.8 (M: 42.1, F: 41.5) | 40.4 (M: 40.6, F: 40.1) |
| Private dwellings | 25,105 (total) 21,103 (occupied) | 23,164 (total) | 22,056 (total) |
| Median household income | $110,000 | $90,482 | $85,789 |
| Year | Pop. | ±% |
|---|---|---|
| 1986 | 20,355 | — |
| 1991 | 28,894 | +42.0% |
| 1996 | 33,680 | +16.6% |
| 2001 | 35,188 | +4.5% |
| 2006 | 42,005 | +19.4% |
| 2011 | 46,393 | +10.4% |
| 2016 | 49,094 | +5.8% |
| 2021 | 54,498 | +11.0% |
Ethnicity
Source: 2021 Census [3]
- 92.0% White
- 4.9% Indigenous
- 3.1% Visible Minority