McMahon, Ontario (1921 census)
McMahon was a census subdivision in Ontario, recorded in the 1921 Census of Canada with a population of 5. The community is grounded to Wikidata Q115262263. The administrative centroid was at approximately 46.572°N, 83.775°W.
Population
In 1921, McMahon had a population of 5. Population density was 0.1 people per square mile.
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.
Earlier boundary forms
- In an earlier year, this CSD was contained in Other parts, 1911 (0.2% share).
Neighbouring Census Subdivisions in 1921
In the 1921 census, McMahon shared boundaries with:
Full census record, 1921
The 1921 census recorded 6 measurements for this Census Subdivision across 2 categories. Tables below are collapsible.
Population & families (3 variables)
| Variable | Value |
|---|---|
| POP F | 1 |
| POP M | 4 |
| POP TOT | 5 |
Other recorded variables (3 variables)
| Variable | Value |
|---|---|
| BRIT BORN M | 2 |
| CAN BORN F | 1 |
| CAN BORN M | 2 |
Identifiers
- TCP UID:
ON102056— year-scoped identifier from the Canadian Census Subdivision boundary file - Persistent place ID:
PLACE_ON102056— computed from spatial-overlap chains across census years - Wikidata: Q115262263
Sources
Census tabulations from the 1921 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). "McMahon, Ontario (1921 census)" in HGIS Canada Knowledge Graph. Retrieved from https://jimclifford.ca/hgiscanada/places/on/mcmahon-on102056-1921/.