Postcode · Bilthoven, Utrecht

Postcode 3721: Neighbourhood Zuid West

On 1 January 2026, postcode 3721 in Bilthoven (Zuid West) had 8,480 residents. 30.2% of them (2,560 people) have a migration background: they were born abroad or have at least one parent who was. That is higher than Bilthoven (26.5%) and higher than the national average (29.1%). The largest origin groups are other Asia (8.5%), Morocco (5.6%) and other Europe (3.5%). 55.3% of residents with a migration background were born abroad themselves. Since 2022 the share has risen by 3.0 percentage points.

Residents: 8,480 on 1 January 2026
Migration background: 30.2% 2,560 people
Born abroad: 55.3% of those with a migration background
Change since 2022: +3.0 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

70% 30%

Dutch origin 69.8% 5,920
Migration background 30.2% 2,560

Largest origin groups

Bars show each group’s share of all residents of 3721. For comparison, the line marks Bilthoven and the circle the Netherlands.

Other Asia Asia excluding Indonesia and Turkey

8.5% 725 people

Bilthoven 4.9% Netherlands 5.3%
Morocco

5.6% 475 people

Bilthoven 4.4% Netherlands 2.4%
Other Europe Europe excluding the Netherlands, Belgium, Germany and Poland

3.5% 295 people

Bilthoven 4.6% Netherlands 5.6%
Other Africa Africa excluding Morocco

3.4% 285 people

Bilthoven 2.3% Netherlands 2.3%
Indonesia

2.4% 205 people

Bilthoven 3.6% Netherlands 1.9%
Other Americas & Oceania Americas and Oceania excluding Suriname and the Dutch Caribbean

1.8% 155 people

Bilthoven 1.7% Netherlands 1.7%
Germany

1.2% 105 people

Bilthoven 1.7% Netherlands 1.9%
Suriname

1.2% 100 people

Bilthoven 0.95% Netherlands 2.0%
Turkey

1.1% 90 people

Bilthoven 0.78% Netherlands 2.6%
Dutch Caribbean Aruba, Curaçao, Sint Maarten, Bonaire, Sint Eustatius and Saba

0.65% 55 people

Bilthoven 0.62% Netherlands 1.1%
Belgium

0.47% 40 people

Bilthoven 0.73% Netherlands 0.76%
Poland

0.41% 35 people

Bilthoven 0.37% Netherlands 1.4%

First and second generation

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

55% 45%

Born abroad (first generation) 55.3% 1,415
Born in the Netherlands (second generation) 44.7% 1,145

Men and women

Men: 4,060
Women: 4,420

Compared with all postcodes

Netherlands 29.1% 3721 30.2%

Higher than 76% 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

30.2%

3721
Bilthoven
Netherlands

Show as table

Year	3721	Bilthoven	Netherlands
1998	16.4%	15.4%	16.7%
1999	16.6%	15.6%	17.1%
2000	16.9%	15.6%	17.5%
2001	17.8%	16.0%	18.0%
2002	18.3%	16.3%	18.4%
2003	18.5%	16.3%	18.8%
2004	18.5%	16.4%	19.0%
2005	18.1%	16.4%	19.2%
2006	17.9%	16.4%	19.3%
2007	18.1%	16.5%	19.4%
2008	17.8%	16.4%	19.6%
2009	18.7%	16.8%	19.9%
2010	19.4%	17.2%	20.3%
2011	20.2%	17.6%	20.6%
2012	20.4%	17.9%	20.9%
2013	20.9%	18.2%	21.1%
2014	21.1%	18.5%	21.4%
2015	21.6%	18.9%	21.7%
2016	21.8%	19.2%	22.1%
2017	22.7%	19.5%	22.6%
2018	23.4%	20.0%	23.1%
2019	24.0%	20.4%	23.6%
2020	24.6%	20.8%	24.2%
2021	25.3%	21.3%	24.6%
2022	27.2%	23.8%	26.0%
2023	27.9%	24.7%	27.1%
2024	28.9%	25.5%	27.9%
2025	29.6%	26.0%	28.5%
2026	30.2%	26.5%	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
3723 De Leijen, Noord	24.5%	10,195	+2.4 pp	Other Europe
3731 West	20.1%	6,150	+0.4 pp	Other Europe
3732 Oost	22.4%	4,675	+1.0 pp	Other Europe
3722 Zuid Oost	24.2%	4,540	+2.9 pp	Morocco
3737 Groenekan	14.2%	2,010	+1.3 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	7,660	6,405	1,255	380	870	35	175	110	280	30	165	5	30	180	65	130	45	695	560
1999	7,685	6,410	1,275	360	915	35	185	100	285	30	150	10	35	165	70	160	50	685	590
2000	7,680	6,380	1,300	355	950	35	215	110	280	30	145	10	35	165	75	155	50	675	630
2001	7,705	6,330	1,375	370	1,000	30	240	110	285	35	145	10	35	180	95	150	55	705	675
2002	7,725	6,315	1,415	390	1,025	30	265	110	270	40	145	15	35	195	100	165	45	700	715
2003	7,710	6,280	1,425	400	1,025	30	280	105	265	40	150	15	35	200	100	160	45	700	725
2004	7,765	6,330	1,435	400	1,035	25	300	100	255	40	145	10	35	210	100	155	60	690	740
2005	7,690	6,305	1,390	370	1,025	20	280	115	250	40	140	15	30	185	105	155	60	655	735
2006	7,635	6,265	1,370	375	1,000	20	290	95	250	40	140	15	25	195	95	150	60	655	715
2007	7,585	6,205	1,375	390	980	20	300	95	245	40	145	20	25	200	90	140	50	660	715
2008	7,560	6,215	1,345	390	965	25	285	95	245	30	140	15	30	205	105	130	50	660	690
2009	7,575	6,160	1,415	410	1,010	25	300	110	235	35	140	15	30	225	115	140	50	670	745
2010	7,620	6,140	1,480	415	1,075	25	310	110	245	40	135	10	30	240	120	150	75	700	785
2011	7,740	6,175	1,565	450	1,120	30	320	115	235	40	140	20	30	260	125	175	80	725	840
2012	7,780	6,190	1,590	460	1,130	30	325	105	230	40	145	20	30	265	140	190	70	725	865
2013	7,795	6,165	1,630	450	1,195	35	335	100	230	35	140	25	30	255	155	205	100	715	920
2014	7,750	6,115	1,635	450	1,185	40	345	100	220	40	140	30	25	255	155	210	75	705	930
2015	7,785	6,105	1,680	435	1,240	40	360	105	220	45	125	30	25	255	150	240	80	695	980
2016	7,785	6,090	1,695	425	1,270	40	350	115	215	45	120	25	30	250	150	275	80	680	1,015
2017	7,975	6,165	1,810	440	1,370	40	370	105	215	50	120	25	30	265	150	350	90	695	1,115
2018	8,025	6,150	1,875	460	1,415	45	340	100	205	50	125	35	30	270	155	445	75	715	1,165
2019	8,015	6,095	1,920	455	1,460	50	330	90	200	50	115	25	25	290	175	480	85	715	1,200
2020	8,040	6,060	1,980	485	1,500	50	345	90	200	50	115	30	20	320	185	480	100	730	1,255
2021	8,190	6,115	2,075	490	1,580	55	380	100	195	50	105	40	20	325	195	505	100	740	1,330
2022	8,375	6,095	2,275	485	1,795	65	440	95	205	45	110	35	30	310	235	585	125	745	1,455
2023	8,430	6,080	2,355	490	1,860	85	435	95	205	45	110	40	30	310	250	615	130	755	1,525
2024	8,445	6,005	2,440	480	1,960	95	450	100	200	50	110	35	30	300	275	660	140	–	–
2025	8,470	5,965	2,505	485	2,020	100	455	90	200	60	115	35	35	295	275	710	130	–	–
2026	8,480	5,920	2,560	475	2,085	90	475	100	205	55	105	35	40	295	285	725	155	–	–

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