Au (SG)
- Canton
- St. Gallen (SG)
- District
- Wahlkreis Rheintal
- BFS number
- 3231
- Postcodes
- 9434, 9435
Population
Official figure
- Permanent residents on 31 December 2010
- 6,993
- Permanent residents on 31 December 2025
- 8,771
- Change 2010–2025
- +25.4%
- Calculated by Votara from official data
Population in 2050?
Votara estimate, not an official forecast canton-level scenario applied proportionally
about 10,700
Estimate for 31 December 2050
How it is calculated
Population 2050 ≈ population 2025 × canton scenario 2050 ÷ canton scenario 2025, rounded to three significant digits.
- Population of Au (SG), 31 December 2025 (OFS/BFS)
- 8,771
- St. Gallen (canton), OFS/BFS reference scenario 2050
- 663,516
- St. Gallen (canton), OFS/BFS reference scenario 2025
- 545,944
- Growth factor of the canton 2025–2050
- 1.215
The OFS/BFS publishes no population scenarios for communes. This estimate applies the growth of the whole canton to the commune; local factors such as building zones or new housing are not taken into account.
Vacancy rate
Official figure
1.53%
Empty dwellings on 1 June 2026, as a share of all dwellings.
St. Gallen (canton): 1.16% (2026)