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Population of Sint-Pieters-Leeuw

Reference date: 2026-01-01

37,055

residents

The official population of Sint-Pieters-Leeuw was 37,055 residents on 1 January 2026, ranking 61st among Belgium's municipalities.

A documented local view of Sint-Pieters-Leeuw
Documented local viewAthenchen · CC BY 2.5 · Adapted for Belgium in Maps; changes were made.
Population density
911.2residents/km²
Rank in Belgium
61stout of 565 municipalities
Population change
+323
Reference date
2026-01-01

Official time series

Official time series: Sint-Pieters-Leeuw2017–2026: 33,758–37,055.37,64836,15434,65933,16533,758201734,038201834,228201934,621202035,061202135,486202236,052202336,525202436,732202537,0552026
2017-01-01 – 2026-01-01

Source: official Statbel data · Statbel

View the exact data table
Official time series
202637,055911.2
202536,732903.2
202436,525898.1
202336,052886.5
202235,486872.6
202135,061862.1
202034,621851.3
201934,228841.7
201834,038837.1
201733,758830.9
201633,512824.8
201533,270818.8
201432,933810.6
201332,677804.3
201232,246793.6
201131,868784.3
201031,572777.1
200931,352771.6

Population

Who lives here

A complete, non-overlapping view of the registered population by age, from the same reference-date record.
Age structureShare of registered residents in five non-overlapping age groups.Under 18: 22.8%18–24: 9.0%25–44: 24.4%45–64: 25.2%65 and older: 18.5%
Reference date: 2026-01-01
View the exact data table
Registered residents by age group
Under 188,46422.8%
18–243,3219.0%
25–449,05024.4%
45–649,35125.2%
65 and older6,86918.5%

Key figures

Municipalities in the same province with a similar population

Use these population patterns in Horizon Mapper for catchment and location-opportunity analysis. Horizon Mapper