Lac des Deux Montagnes, Quebec (1871 census)
Lac des Deux Montagnes was a census subdivision in Quebec, recorded in the 1871 Census of Canada with a population of 735. The administrative centroid was at approximately 45.499°N, 74.071°W.
Population
In 1871, Lac des Deux Montagnes had a population of 735: 370 male and 365 female residents.
Population trajectory across census years
| Year | Population |
|---|---|
| 1851 | 630 |
| 1861 | 562 |
| 1871 | 735 |
Cross-year identity established by spatial polygon overlap (SAME_AS chains across the Canadian Census Subdivision boundary files).
Boundary continuity (non-identical overlaps)
Spatial polygon overlaps with adjacent census years where the boundary shifted enough that the SAME_AS chain didn't merge them. These show where the territory came from and went to even when it isn't tracked as the same persistent place.
Later boundary forms
- In a later year, this CSD contained L'Annonciation, 1881 (83.7% of this CSD's polygon).
Neighbouring Census Subdivisions in 1871
In the 1871 census, Lac des Deux Montagnes shared boundaries with:
Full census record, 1871
The 1871 census recorded 18 measurements for this Census Subdivision across 4 categories.
Population & families (1871). This community's record includes 735 total population, 370 males, 365 females, 229 married persons, 125 families, 115 married males, 114 married females, 38 widowed persons, 30 widowed females, 8 widowed males. (Source: 1871 Census of Canada, V1T1.)
Age structure (1871). This community's record includes 468 single persons under 18, 247 single males under 18, 221 single females under 18. (Source: 1871 Census of Canada, V1T1.)
Buildings & housing (1871). This community's record includes 117 inhabited houses, 117 occupied houses, 20 uninhabited houses, 3 houses under construction. (Source: 1871 Census of Canada, V1T1.)
Agriculture (1871). This community's record includes 18,750 total area (acres). (Source: 1871 Census of Canada, V1T1.)
Identifiers
- TCP UID:
QC097002— year-scoped identifier from the Canadian Census Subdivision boundary file - Persistent place ID:
PLACE_QC097002_1851_1871— computed from spatial-overlap chains across census years - Wikidata: not yet grounded. This page covers a place whose persistent identity has not yet been linked to a Wikidata entity. Identification is via TCP UID and spatial polygon only.
Sources
Census tabulations from the 1871 Census of Canada, transcribed and georeferenced by the Canadian Peoples / TCP project, hosted at the HGIS Lab, University of Saskatchewan. Persistent place identity computed from spatial-overlap chains across all available census years (1851–1921). Identity grounding to Wikidata performed via the HGIS Canada Knowledge Graph project's MCP-assisted disambiguation pipeline. See the About / Methodology page for the full data pipeline.
Cite this page
Clifford, J. (2026). "Lac des Deux Montagnes, Quebec (1871 census)" in HGIS Canada Knowledge Graph. Retrieved from https://jimclifford.ca/hgiscanada/places/qc/lac-des-deux-montagnes-qc097002-1871/.