Postcode · Castricum, North Holland

Postcode 1901: Neighbourhoods Noord, Centrum and Bakkum

On 1 January 2026, postcode 1901 in Castricum (Noord, Centrum and Bakkum) had 15,095 residents. 15.3% of them (2,315 people) have a migration background: they were born abroad or have at least one parent who was. That is about the same as Castricum (15.8%) and lower than the national average (29.1%). The largest origin groups are other Europe (4.0%), other Asia (2.5%) and Indonesia (2.0%). 47.1% of residents with a migration background were born abroad themselves. Since 2022 the share has risen by 1.2 percentage points.

Residents: 15,095 on 1 January 2026
Migration background: 15.3% 2,315 people
Born abroad: 47.1% of those with a migration background
Change since 2022: +1.2 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

85% 15%

Dutch origin 84.7% 12,780
Migration background 15.3% 2,315

Largest origin groups

Bars show each group’s share of all residents of 1901. For comparison, the line marks Castricum and the circle the Netherlands.

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

4.0% 605 people

Castricum 3.8% Netherlands 5.6%
Other Asia Asia excluding Indonesia and Turkey

2.5% 370 people

Castricum 2.9% Netherlands 5.3%
Indonesia

2.0% 305 people

Castricum 2.1% Netherlands 1.9%
Other Americas & Oceania Americas and Oceania excluding Suriname and the Dutch Caribbean

1.8% 275 people

Castricum 1.8% Netherlands 1.7%
Germany

1.6% 240 people

Castricum 1.6% Netherlands 1.9%
Other Africa Africa excluding Morocco

1.2% 180 people

Castricum 1.2% Netherlands 2.3%
Suriname

0.70% 105 people

Castricum 0.65% Netherlands 2.0%
Belgium

0.40% 60 people

Castricum 0.44% Netherlands 0.76%
Turkey

0.36% 55 people

Castricum 0.46% Netherlands 2.6%
Dutch Caribbean Aruba, Curaçao, Sint Maarten, Bonaire, Sint Eustatius and Saba

0.33% 50 people

Castricum 0.44% Netherlands 1.1%
Poland

0.30% 45 people

Castricum 0.29% Netherlands 1.4%
Morocco

0.20% 30 people

Castricum 0.21% Netherlands 2.4%

First and second generation

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

47% 53%

Born abroad (first generation) 47.1% 1,090
Born in the Netherlands (second generation) 53.1% 1,230

Men and women

Men: 7,360
Women: 7,735

Compared with all postcodes

Netherlands 29.1% 1901 15.3%

Higher than 42% 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

15.3%

1901
Castricum
Netherlands

Show as table

Year	1901	Castricum	Netherlands
1998	8.9%	9.1%	16.7%
1999	9.1%	9.4%	17.1%
2000	9.4%	9.6%	17.5%
2001	9.3%	9.7%	18.0%
2002	9.7%	9.9%	18.4%
2003	9.8%	10.0%	18.8%
2004	9.9%	10.1%	19.0%
2005	9.9%	10.0%	19.2%
2006	10.0%	10.3%	19.3%
2007	10.3%	10.4%	19.4%
2008	10.7%	10.7%	19.6%
2009	10.7%	10.9%	19.9%
2010	10.6%	11.0%	20.3%
2011	10.9%	11.1%	20.6%
2012	11.0%	11.2%	20.9%
2013	11.4%	11.4%	21.1%
2014	11.5%	11.6%	21.4%
2015	11.6%	11.8%	21.7%
2016	11.8%	12.0%	22.1%
2017	12.3%	12.4%	22.6%
2018	12.3%	12.4%	23.1%
2019	12.6%	12.7%	23.6%
2020	12.8%	12.9%	24.2%
2021	12.8%	13.0%	24.6%
2022	14.2%	14.6%	26.0%
2023	14.7%	15.0%	27.1%
2024	14.6%	14.9%	27.9%
2025	15.0%	15.4%	28.5%
2026	15.3%	15.8%	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
1852 Stationsomgeving, Noord-West	17.9%	10,565	+2.1 pp	Other Europe
1902 Oost	16.7%	8,695	+1.3 pp	Other Asia
1906 West, Centrum	10.7%	7,790	+0.9 pp	Other Europe
1935 Egmond-Binnen	9.6%	2,550	+1.6 pp	Other Europe
1969 Heemskerkerduin en Noorddorp	9.1%	1,260	+2.9 pp	Other Europe
1968 Heemskerkerduin en Noorddorp	9.4%	320	+0.1 pp	Germany

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	14,165	12,910	1,255	610	645	40	5	60	275	30	275	15	40	280	50	90	95	960	300
1999	14,155	12,855	1,295	630	665	35	10	55	285	35	280	20	40	290	50	85	110	980	315
2000	14,060	12,745	1,315	620	700	40	10	65	290	30	270	20	40	290	60	100	105	980	330
2001	14,020	12,710	1,310	620	690	40	10	70	280	35	265	20	45	290	60	90	105	970	335
2002	14,000	12,650	1,355	625	725	40	5	75	280	40	260	20	45	300	65	100	120	990	360
2003	13,925	12,560	1,365	625	745	45	5	70	285	35	260	20	45	300	65	105	135	995	370
2004	13,940	12,565	1,380	625	760	40	15	75	280	35	250	20	45	310	60	120	135	985	390
2005	13,885	12,515	1,370	620	755	35	10	75	270	35	240	20	45	315	70	130	130	980	390
2006	13,865	12,470	1,390	635	765	35	15	80	270	35	240	20	40	335	65	135	130	990	400
2007	13,895	12,470	1,425	625	795	40	15	65	275	40	240	20	45	320	70	160	130	995	430
2008	13,800	12,325	1,470	665	810	35	10	70	275	40	240	25	40	360	85	165	130	1,030	440
2009	13,755	12,280	1,470	655	815	35	15	75	280	40	235	25	40	355	75	170	125	1,015	460
2010	13,785	12,315	1,465	665	800	30	15	70	275	35	235	25	45	360	70	175	130	1,025	445
2011	13,815	12,310	1,505	665	835	30	15	70	280	50	235	25	40	365	75	190	125	1,030	475
2012	13,745	12,225	1,515	665	850	35	15	65	285	40	235	25	40	365	75	190	145	1,040	475
2013	13,750	12,185	1,565	680	890	40	15	75	275	40	235	30	40	375	85	210	150	1,045	520
2014	13,755	12,170	1,585	680	905	45	10	70	270	45	240	35	35	370	85	225	155	1,050	535
2015	13,830	12,220	1,610	680	930	50	15	70	280	40	225	30	35	390	85	230	160	1,065	540
2016	14,065	12,410	1,655	695	965	55	15	80	285	35	230	30	40	395	95	245	155	1,085	575
2017	14,285	12,530	1,755	710	1,045	50	15	80	295	45	235	40	35	400	110	285	165	1,110	645
2018	14,520	12,735	1,785	720	1,065	50	15	85	295	45	235	30	45	410	120	290	165	1,120	670
2019	14,580	12,740	1,840	730	1,110	45	15	85	300	50	235	35	45	415	140	285	190	1,145	695
2020	14,620	12,745	1,875	755	1,120	45	15	85	290	55	245	35	45	430	150	280	200	1,160	710
2021	14,625	12,760	1,865	770	1,095	40	15	85	285	45	240	30	45	455	145	275	205	1,170	695
2022	14,715	12,630	2,085	805	1,275	45	20	90	300	60	255	25	50	480	165	345	255	1,180	740
2023	14,725	12,550	2,170	865	1,305	50	25	95	305	65	245	35	60	515	165	350	260	1,245	765
2024	14,760	12,610	2,150	850	1,300	50	30	95	305	55	240	30	60	515	165	350	255	–	–
2025	14,945	12,705	2,240	905	1,335	60	25	100	300	50	240	40	60	565	170	370	265	–	–
2026	15,095	12,780	2,315	950	1,365	55	30	105	305	50	240	45	60	605	180	370	275	–	–

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