Postcode · Westknollendam, North Holland

Postcode 1525: Neighbourhood Wormerveer

On 1 January 2026, postcode 1525 in Westknollendam (Wormerveer) had 595 residents. 17.6% of them (105 people) have a migration background: they were born abroad or have at least one parent who was. That is lower than the municipality of Zaanstad (40.6%) and lower than the national average (29.1%). The largest origin groups are other Europe (5.0%), Turkey (2.5%) and Germany (2.5%). 42.9% of residents with a migration background were born abroad themselves. Since 2022 the share has fallen by 2.7 percentage points.

Residents: 595 on 1 January 2026
Migration background: 17.6% 105 people
Born abroad: 42.9% of those with a migration background
Change since 2022: −2.7 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

82% 18%

Dutch origin 82.4% 490
Migration background 17.6% 105

Largest origin groups

Bars show each group’s share of all residents of 1525. For comparison, the line marks Zaanstad and the circle the Netherlands.

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

5.0% 30 people

Zaanstad 7.8% Netherlands 5.6%
Turkey

2.5% 15 people

Zaanstad 8.7% Netherlands 2.6%
Germany

2.5% 15 people

Zaanstad 1.3% Netherlands 1.9%
Morocco

1.7% 10 people

Zaanstad 3.5% Netherlands 2.4%
Indonesia

1.7% 10 people

Zaanstad 2.2% Netherlands 1.9%
Other Asia Asia excluding Indonesia and Turkey

1.7% 10 people

Zaanstad 6.2% Netherlands 5.3%
Suriname

0.84% 5 people

Zaanstad 3.8% Netherlands 2.0%
Dutch Caribbean Aruba, Curaçao, Sint Maarten, Bonaire, Sint Eustatius and Saba

0.84% 5 people

Zaanstad 0.77% Netherlands 1.1%
Other Americas & Oceania Americas and Oceania excluding Suriname and the Dutch Caribbean

0.84% 5 people

Zaanstad 2.1% Netherlands 1.7%
Poland

0.0% 0 people

Zaanstad 1.1% Netherlands 1.4%
Belgium

0.0% 0 people

Zaanstad 0.31% Netherlands 0.76%
Other Africa Africa excluding Morocco

0.0% 0 people

Zaanstad 2.8% 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) 42.9% 45
Born in the Netherlands (second generation) 57.1% 60

Men and women

Men: 300
Women: 290

Compared with all postcodes

Netherlands 29.1% 1525 17.6%

Higher than 50% 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

17.6%

1525
Zaanstad
Netherlands

Show as table

Year	1525	Zaanstad	Netherlands
1998	10.4%	20.4%	16.7%
1999	10.3%	20.8%	17.1%
2000	9.6%	21.3%	17.5%
2001	9.4%	21.7%	18.0%
2002	9.2%	22.3%	18.4%
2003	9.6%	23.0%	18.8%
2004	10.4%	23.3%	19.0%
2005	12.2%	23.5%	19.2%
2006	12.1%	24.0%	19.3%
2007	11.4%	24.5%	19.4%
2008	12.4%	25.0%	19.6%
2009	13.0%	25.7%	19.9%
2010	13.0%	26.2%	20.3%
2011	14.2%	26.7%	20.6%
2012	13.3%	27.4%	20.9%
2013	14.3%	27.9%	21.1%
2014	15.4%	28.4%	21.4%
2015	15.0%	28.9%	21.7%
2016	15.9%	29.6%	22.1%
2017	14.4%	30.5%	22.6%
2018	16.2%	31.3%	23.1%
2019	15.4%	32.3%	23.6%
2020	17.8%	33.3%	24.2%
2021	17.2%	34.0%	24.6%
2022	20.3%	35.4%	26.0%
2023	18.6%	37.1%	27.1%
2024	18.4%	38.2%	27.9%
2025	18.6%	39.3%	28.5%
2026	17.6%	40.6%	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
1911 Oude Dorp, De Koog	15.8%	13,490	+1.7 pp	Other Asia
1521 Noord, Centrum	32.6%	12,140	+3.8 pp	Other Europe
1562 West	24.6%	9,025	+3.3 pp	Other Asia
1561 Oost	24.2%	8,210	+3.1 pp	Other Asia
1534 Wormer	13.1%	495	+3.8 pp	Other Europe
1536 Graft-De Rijp	11.1%	315	+0.2 pp	Other Europe
1488 Graft-De Rijp	9.5%	210	+0.2 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	575	515	60	30	25	0	0	5	20	0	15	0	0	15	5	0	0	50	10
1999	585	525	60	35	35	0	0	0	20	5	15	0	0	20	5	5	0	50	10
2000	575	520	55	25	30	0	0	5	20	0	20	0	0	5	5	0	0	50	10
2001	585	525	55	25	30	0	0	5	20	0	15	0	0	10	5	0	0	50	10
2002	595	535	55	30	30	0	0	5	15	0	15	0	0	15	5	5	0	50	10
2003	570	520	55	25	25	0	0	0	15	0	15	0	0	10	5	0	5	45	10
2004	575	510	60	30	30	0	0	0	15	0	15	0	0	15	5	5	5	50	10
2005	575	505	70	35	30	5	0	5	10	0	15	0	0	20	10	0	0	55	15
2006	580	510	70	40	30	0	5	5	10	5	15	5	0	20	5	0	0	50	15
2007	570	510	65	40	20	0	0	5	10	5	15	0	0	25	5	0	0	55	10
2008	565	500	70	40	25	0	5	0	10	0	20	0	0	20	5	0	5	55	15
2009	615	535	80	45	40	0	5	5	15	0	20	0	0	25	10	5	0	55	25
2010	615	530	80	45	40	0	10	5	15	0	25	0	0	20	5	5	0	55	25
2011	600	520	85	40	40	5	5	5	10	5	20	0	0	20	5	10	0	60	25
2012	600	520	80	45	40	0	10	5	15	0	25	0	0	20	0	5	5	55	25
2013	595	510	85	50	45	0	5	5	15	0	25	0	0	25	10	5	5	60	30
2014	585	495	90	40	45	5	10	5	10	0	20	0	0	20	5	10	0	55	30
2015	565	480	85	50	40	0	5	10	15	0	20	0	0	30	5	5	0	60	25
2016	565	475	90	45	45	0	5	10	15	5	15	0	5	25	0	10	0	60	30
2017	555	475	80	40	45	0	10	0	20	5	20	0	0	20	0	5	5	55	25
2018	585	490	95	50	45	0	5	5	15	5	15	5	5	25	5	10	0	65	30
2019	585	495	90	40	50	5	5	0	10	5	20	5	0	15	5	15	5	60	30
2020	590	485	105	50	55	0	10	5	15	5	20	5	0	25	0	15	5	65	40
2021	580	480	100	45	60	5	5	5	15	5	20	5	0	20	5	15	5	65	40
2022	590	475	120	55	65	10	10	5	10	10	15	5	0	30	5	20	10	60	45
2023	565	460	105	55	55	5	10	5	10	5	15	5	0	30	5	10	5	60	40
2024	570	465	105	50	55	10	5	5	10	5	15	0	0	30	0	10	5	–	–
2025	590	480	110	45	65	15	10	0	15	5	15	0	5	25	0	15	5	–	–
2026	595	490	105	45	60	15	10	5	10	5	15	0	0	30	0	10	5	–	–

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