Census Tract
A small, relatively stable geographic area that usually has a population of less than 7,500 persons, based on data from the previous Census of Population Program.
Appears in
Constraints
Unique key(s)
- Census Tract Identifier, Geography Effective Date
- XOR(Census Metropolitan Area, Census Agglomeration)
Stereotype(s)
n/a
Attributes
| Attribute | Type | Multiplicity | Attribute note |
|---|---|---|---|
| Geographic Boundary | Polygon | 0..1 | The abstract lines or physical features that separate one place or area from another. |
| Census Tract Identifier | Identifier | 1 | Identifies a census tract within a census metropolitan area or census agglomeration. The first 3 digits represent the metropolitan area/census agglomeration code followed by the census tract 'name'. This is then followed by a decimal point and then 2 more digits. These 2 digits represent census tracts that have been split into 2 or more parts due to a population increase. For example, CT 0412.24 means the census tract has been split 24 times. |
| Geography Effective Date | Date | 1 | The first date when the information specified is valid, which is generally the release date of a census. |
Relationships
| From class | From multiplicity | Relationship | To class | To multiplicity |
|---|---|---|---|---|
| Census Metropolitan Area | 0..1 | has (aggregation) | Census Tract | 0..* |
| Census Agglomeration | 0..1 | has (aggregation) | Census Tract | 0..* |
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How to cite:
Canadian Institute for Health Information. Census Tract. Accessed November 02, 2026.
