Postcode · Westbroek, Utrecht

Postcode 3615: Migration background and origin

On 1 January 2026, postcode 3615 in Westbroek had 1,205 residents. 9.5% of them (115 people) have a migration background: they were born abroad or have at least one parent who was. That is lower than the municipality of De Bilt (22.6%) and lower than the national average (29.1%). The largest origin groups are other Europe (3.3%), Morocco (0.83%) and Suriname (0.83%). 43.5% of residents with a migration background were born abroad themselves. Since 2022 the share has risen by 1.4 percentage points.

Residents: 1,205 on 1 January 2026
Migration background: 9.5% 115 people
Born abroad: 43.5% of those with a migration background
Change since 2022: +1.4 pp in share with a migration background

Migration background, share of residents

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

90%

Dutch origin 90.5% 1,090
Migration background 9.5% 115

Largest origin groups

Bars show each group’s share of all residents of 3615. For comparison, the line marks Municipality of De Bilt and the circle the Netherlands.

Other Europe Europe excluding the Netherlands, Belgium, Germany and Poland

3.3% 40 people

Municipality of De Bilt 4.2% Netherlands 5.6%
Morocco

0.83% 10 people

Municipality of De Bilt 3.3% Netherlands 2.4%
Suriname

0.83% 10 people

Municipality of De Bilt 0.84% Netherlands 2.0%
Indonesia

0.83% 10 people

Municipality of De Bilt 2.9% Netherlands 1.9%
Other Asia Asia excluding Indonesia and Turkey

0.83% 10 people

Municipality of De Bilt 4.0% Netherlands 5.3%
Other Americas & Oceania Americas and Oceania excluding Suriname and the Dutch Caribbean

0.83% 10 people

Municipality of De Bilt 1.6% Netherlands 1.7%
Turkey

0.41% 5 people

Municipality of De Bilt 0.72% Netherlands 2.6%
Dutch Caribbean Aruba, Curaçao, Sint Maarten, Bonaire, Sint Eustatius and Saba

0.41% 5 people

Municipality of De Bilt 0.54% Netherlands 1.1%
Germany

0.41% 5 people

Municipality of De Bilt 1.7% Netherlands 1.9%
Poland

0.41% 5 people

Municipality of De Bilt 0.35% Netherlands 1.4%
Belgium

0.41% 5 people

Municipality of De Bilt 0.62% Netherlands 0.76%
Other Africa Africa excluding Morocco

0.41% 5 people

Municipality of De Bilt 1.8% Netherlands 2.3%

First and second generation

Residents with a migration background, by whether they were born abroad themselves.

43% 57%

Born abroad (first generation) 43.5% 50
Born in the Netherlands (second generation) 56.5% 65

Men and women

Men: 630
Women: 575

Compared with all postcodes

Netherlands 29.1% 3615 9.5%

Higher than 17% of all postcodes in the Netherlands

Trend since 1998

Share of residents with a migration background, compared with larger areas.

Show

Measure % Residents

New CBS classification

9.5%

3615
Municipality of De Bilt
Netherlands

Show as table

Year	3615	Municipality of De Bilt	Netherlands
1998	4.9%	13.3%	16.7%
1999	4.5%	13.4%	17.1%
2000	4.8%	13.5%	17.5%
2001	5.2%	13.9%	18.0%
2002	5.5%	14.3%	18.4%
2003	5.2%	14.5%	18.8%
2004	5.4%	14.4%	19.0%
2005	6.0%	14.4%	19.2%
2006	5.9%	14.4%	19.3%
2007	5.6%	14.5%	19.4%
2008	5.7%	14.6%	19.6%
2009	6.2%	14.9%	19.9%
2010	6.1%	15.1%	20.3%
2011	6.2%	15.4%	20.6%
2012	6.6%	15.7%	20.9%
2013	7.0%	15.9%	21.1%
2014	7.1%	16.2%	21.4%
2015	6.7%	16.5%	21.7%
2016	6.4%	16.7%	22.1%
2017	6.8%	17.1%	22.6%
2018	6.8%	17.5%	23.1%
2019	6.9%	17.9%	23.6%
2020	7.8%	18.3%	24.2%
2021	8.5%	18.7%	24.6%
2022	8.1%	20.6%	26.0%
2023	9.4%	21.6%	27.1%
2024	10.1%	22.2%	27.9%
2025	8.8%	22.5%	28.5%
2026	9.5%	22.6%	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

				Largest group
3738 Maartensdijk	15.6%	4,905	+2.2 pp	Other Asia
3737 Groenekan	14.2%	2,010	+1.3 pp	Other Europe
3612 Oud Maarsseveen, Molenpolder	12.4%	1,820	+0.5 pp	Other Europe
3739 Hollandsche Rading	18.0%	1,525	+1.4 pp	Other Europe

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	1,235	1,170	60	30	30	0	0	10	5	0	10	0	5	15	0	10	5	40	20
1999	1,230	1,175	55	30	25	0	0	5	10	0	10	0	5	15	0	5	5	40	15
2000	1,240	1,180	60	30	25	0	0	5	10	0	10	0	5	15	0	5	5	40	20
2001	1,260	1,195	65	30	35	0	0	5	10	5	10	0	5	15	5	10	0	35	30
2002	1,265	1,200	70	30	45	0	0	5	10	5	5	0	5	20	5	15	5	35	30
2003	1,260	1,195	65	25	35	0	0	5	10	0	10	0	5	10	0	10	10	40	25
2004	1,290	1,220	70	30	35	0	0	10	5	0	5	0	5	20	0	15	5	40	25
2005	1,260	1,185	75	30	40	0	0	5	5	5	5	0	5	20	5	15	5	45	30
2006	1,270	1,190	75	35	40	0	0	5	5	0	5	0	5	25	5	15	10	45	30
2007	1,255	1,180	70	30	40	0	0	5	10	5	5	0	5	20	0	10	10	45	30
2008	1,220	1,150	70	30	40	0	0	10	10	0	5	0	5	20	5	10	5	45	25
2009	1,205	1,130	75	30	40	0	5	10	10	5	5	0	5	20	5	5	0	40	35
2010	1,220	1,145	75	40	40	0	5	5	5	5	5	0	10	25	5	10	5	50	30
2011	1,215	1,135	75	35	45	0	5	10	5	5	5	5	5	20	10	10	0	45	35
2012	1,215	1,135	80	35	40	0	5	10	10	5	10	0	5	20	5	0	5	45	30
2013	1,210	1,120	85	30	55	5	5	10	10	5	10	5	10	5	10	10	0	50	40
2014	1,200	1,115	85	35	45	0	5	10	10	5	5	0	5	25	5	10	0	45	35
2015	1,200	1,120	80	30	55	0	10	10	10	5	5	0	5	20	0	10	10	45	35
2016	1,175	1,100	75	30	50	0	5	15	10	5	5	0	5	20	5	5	5	45	35
2017	1,185	1,105	80	35	45	0	10	10	5	5	5	5	5	20	0	15	0	45	35
2018	1,185	1,105	80	35	40	0	5	10	10	5	5	0	0	30	5	5	0	45	30
2019	1,155	1,075	80	35	45	0	10	10	10	0	5	0	5	25	0	5	15	45	30
2020	1,150	1,060	90	35	55	0	10	10	10	5	5	0	5	25	5	5	10	50	35
2021	1,170	1,070	100	40	55	0	15	10	10	5	10	0	5	25	0	10	10	55	45
2022	1,170	1,075	95	35	55	0	15	15	10	5	5	0	0	25	0	5	10	55	40
2023	1,170	1,060	110	55	55	5	10	10	10	5	5	0	5	40	0	10	10	65	35
2024	1,185	1,065	120	60	60	5	15	10	10	5	5	5	5	45	5	10	10	–	–
2025	1,195	1,090	105	55	55	0	10	10	10	5	5	0	5	40	0	10	10	–	–
2026	1,205	1,090	115	55	60	5	10	10	10	5	5	5	5	40	5	10	10	–	–

Definitions and method · CBS 85640NED (2022–2026), 83503NED (1998–2023)