A Statistical Area Level 4 (SA4) is primarily defined by its population size, which generally ranges from over 100,000 people, varying significantly between regional and metropolitan areas across Australia. These geographic units are designed by the Australian Bureau of Statistics (ABS) to provide sufficient sample sizes for critical statistical collections, particularly for reliable Labour Force estimates.
Understanding SA4 Population Ranges
The size of an SA4 is determined by its resident population, which is crucial for ensuring the statistical reliability of data collected for these areas. While the minimum population threshold for most SA4s is above 100,000, the typical population can differ based on whether the area is urban or regional.
Here's a breakdown of typical SA4 population sizes:
| Type of Area | Typical Population Range | Key Characteristic |
|---|---|---|
| Most SA4s | Above 100,000 people | Designed to ensure sufficient sample sizes for statistical estimates, like the Labour Force. |
| Regional SA4s | 100,000 to 300,000 people | Tend to have smaller populations, reflecting the lower population density outside major cities. |
| City SA4s | 300,000 to 500,000 people | Generally encompass larger populations, reflecting the higher population density within urban centers. |
Purpose of SA4s
SA4s represent a high-level statistical geography, sitting above Statistical Area Level 3 (SA3) and below the Greater Capital City Statistical Areas (GCCSA). They are specifically designed for the dissemination of detailed Labour Force data and other regional statistics, making them vital for economic and social analysis at a sub-state level.
For more comprehensive information on Australia's statistical geography, including the structure and purpose of SA4s, you can refer to the Australian Statistical Geography Standard (ASGS) published by the Australian Bureau of Statistics.
