Seneca, Ontario (1921 census)
Seneca was a census subdivision in Ontario, recorded in the 1921 Census of Canada with a population of 1,742. The community is grounded to Wikidata Q115262795. The administrative centroid was at approximately 43.044°N, 79.849°W.
Population
In 1921, Seneca had a population of 1,742: 924 male and 818 female residents. Population density was 24.1 people per square mile.
Population trajectory across census years
| Year | Population |
|---|---|
| 1851 | 3,636 |
| 1861 | 4,577 |
| 1871 | 3,282 |
| 1881 | 2,545 |
| 1891 | 2,231 |
| 1901 | 1,885 |
| 1911 | 1,712 |
| 1921 | 1,742 |
Cross-year identity established by spatial polygon overlap (SAME_AS chains across the Canadian Census Subdivision boundary files).
Neighbouring Census Subdivisions in 1921
In the 1921 census, Seneca shared boundaries with:
- Ancaster
- Binbrook
- Caistor
- Caledonia, Village
- Canboro
- Cayuga N
- Glanford
- Indian reserves
- Oneida
- Onondaga
Full census record, 1921
The 1921 census recorded 31 measurements for this Census Subdivision across 2 categories. Tables below are collapsible.
Population & families (3 variables)
| Variable | Value |
|---|---|
| POP F | 818 |
| POP M | 924 |
| POP TOT | 1,742 |
Other recorded variables (28 variables)
| Variable | Value |
|---|---|
| ANGLICANS | 448 |
| BAPTISTS | 121 |
| BRIT BORN F | 71 |
| BRIT BORN M | 74 |
| BRIT ENG | 815 |
| BRIT IRISH | 437 |
| BRIT OTHER | 14 |
| BRIT SCOTCH | 286 |
| CAN BORN F | 721 |
| CAN BORN M | 812 |
| EUR AUSTRIAN | 4 |
| EUR DUTCH | 27 |
| EUR FINNISH | 1 |
| EUR FRENCH | 24 |
| EUR GERMAN | 44 |
| EUR ITALIAN | 2 |
| EUR OTHER | 29 |
| EUR POLISH | 14 |
| EUR RUSSIAN | 5 |
| EUR SCANDINAVIAN | 5 |
| FOREIGN BORN F | 26 |
| FOREIGN BORN M | 38 |
| INDIAN | 35 |
| LUTHERANS | 9 |
| METHODISTS | 593 |
| OTHER SECTS | 15 |
| PRESBYTERIANS | 403 |
| ROMAN CATHOLICS | 153 |
Identifiers
- TCP UID:
ON115008— year-scoped identifier from the Canadian Census Subdivision boundary file - Persistent place ID:
PLACE_ON115008— computed from spatial-overlap chains across census years - Wikidata: Q115262795
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). "Seneca, Ontario (1921 census)" in HGIS Canada Knowledge Graph. Retrieved from https://jimclifford.ca/hgiscanada/places/on/seneca-on115008-1921/.