Sarnia, Ontario (1921 census)
Sarnia was a census subdivision in Ontario, recorded in the 1921 Census of Canada with a population of 2,583. The community is grounded to Wikidata Q115262762. The administrative centroid was at approximately 42.968°N, 82.317°W.
Population
In 1921, Sarnia had a population of 2,583: 1,371 male and 1,212 female residents. Population density was 35.3 people per square mile.
Population trajectory across census years
| Year | Population |
|---|---|
| 1851 | 1,384 |
| 1861 | 1,560 |
| 1871 | 3,438 |
| 1881 | 3,583 |
| 1891 | 2,937 |
| 1901 | 2,632 |
| 1911 | 2,663 |
| 1921 | 2,583 |
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.
Earlier boundary forms
- In an earlier year, this CSD was contained in Sarnia, 1911 (93.4% share).
Neighbouring Census Subdivisions in 1921
In the 1921 census, Sarnia shared boundaries with:
Full census record, 1921
The 1921 census recorded 38 measurements for this Census Subdivision across 2 categories. Tables below are collapsible.
Population & families (3 variables)
| Variable | Value |
|---|---|
| POP F | 1,212 |
| POP M | 1,371 |
| POP TOT | 2,583 |
Other recorded variables (35 variables)
| Variable | Value |
|---|---|
| ANGLICANS | 517 |
| ASIA CHINESE AND JAPANESE | 1 |
| BAPTISTS | 208 |
| BRETHREN | 4 |
| BRIT BORN F | 134 |
| BRIT BORN M | 191 |
| BRIT ENG | 1,423 |
| BRIT IRISH | 454 |
| BRIT OTHER | 23 |
| BRIT SCOTCH | 505 |
| CAN BORN F | 1,014 |
| CAN BORN M | 1,119 |
| CHRISTIANS | 12 |
| CONGREGATIONALISTS | 4 |
| DISCIPLES OF CHRIST | 13 |
| EUR BELGIAN | 39 |
| EUR DUTCH | 24 |
| EUR FRENCH | 35 |
| EUR GERMAN | 54 |
| EUR ITALIAN | 4 |
| EUR OTHER | 2 |
| EUR POLISH | 10 |
| EUR SCANDINAVIAN | 2 |
| FOREIGN BORN F | 64 |
| FOREIGN BORN M | 61 |
| INDIAN | 2 |
| LUTHERANS | 1 |
| METHODISTS | 947 |
| MORMONS | 18 |
| NEGRO | 5 |
| OTHER SECTS | 11 |
| PRESBYTERIANS | 658 |
| PROTESTANTS | 1 |
| ROMAN CATHOLICS | 182 |
| SALVATION ARMY | 7 |
Identifiers
- TCP UID:
ON122008— year-scoped identifier from the Canadian Census Subdivision boundary file - Persistent place ID:
PLACE_ON122008— computed from spatial-overlap chains across census years - Wikidata: Q115262762
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). "Sarnia, Ontario (1921 census)" in HGIS Canada Knowledge Graph. Retrieved from https://jimclifford.ca/hgiscanada/places/on/sarnia-on122008-1921/.