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Population of Diest

Reference date: 2026-01-01

25,196

residents

The official population of Diest was 25,196 residents on 1 January 2026, ranking 123rd among Belgium's municipalities.

Molen van Schaffen, a documented local view of Diest
Molen van Schaffenhttps://id.erfgoed.net/afbeeldingen/319528 · CC BY 4.0 · Adapted for Belgium in Maps; changes were made.
Population density
429.1residents/km²
Rank in Belgium
123rdout of 565 municipalities
Population change
+55
Reference date
2026-01-01

Official time series

Official time series: Diest2017–2026: 23,612–25,196.25,48124,76324,04523,32723,612201723,824201823,998201924,234202024,370202124,516202224,677202324,971202425,141202525,1962026
2017-01-01 – 2026-01-01

Source: official Statbel data · Statbel

View the exact data table
Official time series
202625,196429.1
202525,141428.2
202424,971425.3
202324,677420.3
202224,516417.5
202124,370415.0
202024,234412.7
201923,998408.8
201823,824405.8
201723,612402.5
201623,538401.2
201523,429399.4
201423,219395.8
201323,271396.7
201223,259396.5
201123,154394.7
201023,048392.9
200923,069393.2

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: 17.0%18–24: 7.4%25–44: 23.2%45–64: 27.4%65 and older: 25.0%
Reference date: 2026-01-01
View the exact data table
Registered residents by age group
Under 184,29017.0%
18–241,8587.4%
25–445,85323.2%
45–646,89627.4%
65 and older6,29925.0%

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