Postcode · De Bilt, Utrecht
Postcode 3731: Neighbourhood West
On 1 January 2026, postcode 3731 in De Bilt (West) had 6,150 residents. 20.1% of them (1,235 people) have a migration background: they were born abroad or have at least one parent who was. That is about the same as De Bilt (21.1%) and lower than the national average (29.1%). The largest origin groups are other Europe (3.5%), other Asia (2.9%) and Indonesia (2.8%). 47.0% of residents with a migration background were born abroad themselves. Since 2022 the share has hardly changed.
- Residents
- 6,150 on 1 January 2026
- Migration background
- 20.1% 1,235 people
- Born abroad
- 47.0% of those with a migration background
- Change since 2022
- +0.4 pp in share with a migration background
Map
Share of residents with a migration background in this postcode and its neighbours.
Where residents come from
Origin of residents on 1 January 2026, as a share of all residents.
Dutch origin and migration background
- Dutch origin 79.9% 4,915
- Migration background 20.1% 1,235
Largest origin groups
First and second generation
Residents with a migration background, by whether they were born abroad themselves.
- Born abroad (first generation) 47.0% 580
- Born in the Netherlands (second generation) 53.0% 655
Men and women
- Men
- 2,950
- Women
- 3,195
Compared with all postcodes
Trend since 1998
Share of residents with a migration background, compared with larger areas.
- 3731
- De Bilt
- Netherlands
Show as table
| Year | 3731 | De Bilt | Netherlands |
|---|---|---|---|
| 1998 | 13.8% | 12.9% | 16.7% |
| 1999 | 14.1% | 13.1% | 17.1% |
| 2000 | 14.4% | 13.4% | 17.5% |
| 2001 | 14.5% | 13.8% | 18.0% |
| 2002 | 14.5% | 14.0% | 18.4% |
| 2003 | 14.8% | 14.4% | 18.8% |
| 2004 | 15.0% | 14.7% | 19.0% |
| 2005 | 15.4% | 14.9% | 19.2% |
| 2006 | 15.3% | 15.0% | 19.3% |
| 2007 | 15.2% | 15.0% | 19.4% |
| 2008 | 15.5% | 15.4% | 19.6% |
| 2009 | 15.3% | 15.7% | 19.9% |
| 2010 | 14.9% | 15.6% | 20.3% |
| 2011 | 15.3% | 16.0% | 20.6% |
| 2012 | 15.3% | 16.2% | 20.9% |
| 2013 | 15.8% | 16.5% | 21.1% |
| 2014 | 16.2% | 16.9% | 21.4% |
| 2015 | 16.5% | 17.0% | 21.7% |
| 2016 | 16.5% | 16.8% | 22.1% |
| 2017 | 16.8% | 17.4% | 22.6% |
| 2018 | 17.1% | 17.9% | 23.1% |
| 2019 | 17.4% | 18.1% | 23.6% |
| 2020 | 17.9% | 18.7% | 24.2% |
| 2021 | 17.7% | 19.0% | 24.6% |
| 2022 | 19.7% | 20.4% | 26.0% |
| 2023 | 20.3% | 21.4% | 27.1% |
| 2024 | 20.4% | 22.1% | 27.9% |
| 2025 | 20.4% | 21.8% | 28.5% |
| 2026 | 20.1% | 21.1% | 29.1% |
In 2022 CBS switched to a new origin classification. Up to 2021 the line shows the old “migration background” figures; the overlap years show a small break (about +0.8 points nationally).
Nearby postcodes
All figures
Number of residents per origin group on 1 January. Figures up to 2021 use the old CBS classification.
| Year | Total residents | Dutch origin | Migration background | Europe | Outside Europe | Turkey | Morocco | Suriname | Indonesia | Dutch Caribbean | Germany | Poland | Belgium | Other Europe | Other Africa | Other Asia | Other Americas & Oceania | Western migration background | Non-Western migration background |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1998 | 5,990 | 5,165 | 825 | 260 | 565 | 30 | 115 | 50 | 220 | 15 | 125 | 15 | 30 | 90 | 40 | 50 | 45 | 510 | 315 |
| 1999 | 5,970 | 5,130 | 840 | 265 | 575 | 25 | 120 | 50 | 220 | 15 | 115 | 15 | 35 | 100 | 40 | 60 | 45 | 505 | 330 |
| 2000 | 5,905 | 5,050 | 850 | 285 | 570 | 30 | 110 | 55 | 220 | 15 | 125 | 20 | 30 | 110 | 40 | 60 | 40 | 530 | 325 |
| 2001 | 5,865 | 5,015 | 850 | 295 | 555 | 25 | 110 | 40 | 220 | 15 | 125 | 20 | 25 | 125 | 30 | 65 | 50 | 535 | 310 |
| 2002 | 5,870 | 5,025 | 850 | 290 | 560 | 20 | 100 | 50 | 210 | 20 | 120 | 15 | 30 | 125 | 35 | 75 | 50 | 525 | 325 |
| 2003 | 5,935 | 5,050 | 880 | 290 | 585 | 30 | 110 | 55 | 215 | 20 | 135 | 15 | 25 | 115 | 40 | 70 | 45 | 535 | 350 |
| 2004 | 5,975 | 5,075 | 895 | 295 | 600 | 35 | 105 | 55 | 220 | 20 | 130 | 15 | 25 | 125 | 40 | 80 | 45 | 540 | 360 |
| 2005 | 6,040 | 5,110 | 930 | 295 | 645 | 35 | 110 | 60 | 225 | 15 | 130 | 15 | 25 | 125 | 55 | 85 | 60 | 545 | 390 |
| 2006 | 6,020 | 5,105 | 920 | 295 | 625 | 30 | 100 | 60 | 220 | 25 | 125 | 15 | 20 | 135 | 55 | 85 | 50 | 540 | 380 |
| 2007 | 5,995 | 5,085 | 910 | 310 | 595 | 30 | 105 | 45 | 210 | 20 | 135 | 20 | 25 | 130 | 40 | 95 | 50 | 540 | 370 |
| 2008 | 5,985 | 5,065 | 925 | 330 | 595 | 30 | 95 | 45 | 205 | 15 | 140 | 15 | 25 | 150 | 55 | 100 | 50 | 555 | 370 |
| 2009 | 5,995 | 5,070 | 920 | 315 | 600 | 35 | 105 | 40 | 200 | 15 | 130 | 20 | 25 | 140 | 60 | 100 | 45 | 540 | 385 |
| 2010 | 5,955 | 5,065 | 890 | 305 | 595 | 35 | 120 | 40 | 195 | 15 | 115 | 25 | 25 | 140 | 50 | 100 | 40 | 515 | 380 |
| 2011 | 5,955 | 5,045 | 910 | 310 | 605 | 35 | 130 | 40 | 185 | 20 | 125 | 25 | 25 | 135 | 50 | 110 | 35 | 505 | 405 |
| 2012 | 5,965 | 5,050 | 915 | 305 | 610 | 40 | 125 | 35 | 190 | 20 | 120 | 15 | 35 | 135 | 55 | 105 | 40 | 510 | 400 |
| 2013 | 5,970 | 5,030 | 945 | 320 | 625 | 35 | 130 | 35 | 180 | 20 | 115 | 15 | 35 | 155 | 60 | 115 | 50 | 525 | 415 |
| 2014 | 5,985 | 5,015 | 970 | 325 | 640 | 35 | 135 | 40 | 180 | 20 | 115 | 20 | 40 | 150 | 65 | 120 | 45 | 530 | 435 |
| 2015 | 6,005 | 5,015 | 990 | 335 | 655 | 35 | 150 | 40 | 180 | 20 | 120 | 20 | 35 | 160 | 60 | 120 | 50 | 540 | 455 |
| 2016 | 6,020 | 5,025 | 995 | 325 | 670 | 35 | 160 | 50 | 180 | 15 | 120 | 20 | 35 | 150 | 55 | 125 | 50 | 530 | 465 |
| 2017 | 6,010 | 5,000 | 1,010 | 330 | 675 | 35 | 160 | 50 | 175 | 15 | 120 | 20 | 40 | 150 | 55 | 135 | 50 | 535 | 475 |
| 2018 | 6,015 | 4,985 | 1,030 | 355 | 675 | 35 | 160 | 50 | 170 | 15 | 120 | 20 | 40 | 175 | 55 | 140 | 50 | 555 | 475 |
| 2019 | 6,015 | 4,970 | 1,045 | 365 | 680 | 35 | 165 | 45 | 165 | 15 | 120 | 25 | 40 | 180 | 50 | 150 | 55 | 560 | 485 |
| 2020 | 6,105 | 5,015 | 1,090 | 370 | 715 | 35 | 170 | 50 | 165 | 15 | 130 | 20 | 25 | 195 | 65 | 160 | 55 | 565 | 520 |
| 2021 | 6,115 | 5,030 | 1,085 | 375 | 710 | 30 | 165 | 50 | 165 | 15 | 130 | 25 | 25 | 195 | 65 | 155 | 65 | 570 | 515 |
| 2022 | 6,120 | 4,920 | 1,205 | 390 | 815 | 40 | 165 | 55 | 185 | 20 | 140 | 20 | 35 | 195 | 80 | 185 | 85 | 570 | 550 |
| 2023 | 6,110 | 4,870 | 1,240 | 420 | 820 | 40 | 175 | 55 | 175 | 20 | 145 | 25 | 40 | 220 | 80 | 175 | 95 | 605 | 560 |
| 2024 | 6,060 | 4,825 | 1,235 | 430 | 810 | 45 | 160 | 55 | 175 | 25 | 150 | 25 | 30 | 220 | 90 | 165 | 90 | – | – |
| 2025 | 6,105 | 4,860 | 1,245 | 425 | 820 | 50 | 155 | 55 | 175 | 25 | 135 | 25 | 35 | 230 | 95 | 175 | 90 | – | – |
| 2026 | 6,150 | 4,915 | 1,235 | 405 | 830 | 45 | 160 | 55 | 170 | 30 | 135 | 25 | 35 | 215 | 90 | 180 | 95 | – | – |
Definitions and method · CBS 85640NED (2022–2026), 83503NED (1998–2023)