Postcode · Maassluis, South Holland

Postcode 3144: Neighbourhood Kapelpolder

On 1 January 2026, postcode 3144 in Maassluis (Kapelpolder) had 7,705 residents. 33.7% of them (2,595 people) have a migration background: they were born abroad or have at least one parent who was. That is about the same as Maassluis (33.2%) and higher than the national average (29.1%). The largest origin groups are Turkey (9.2%), other Asia (5.4%) and Morocco (3.5%). 53.6% of residents with a migration background were born abroad themselves. Since 2022 the share has risen by 3.7 percentage points.

Residents: 7,705 on 1 January 2026
Migration background: 33.7% 2,595 people
Born abroad: 53.6% of those with a migration background
Change since 2022: +3.7 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

66% 34%

Dutch origin 66.4% 5,115
Migration background 33.7% 2,595

Largest origin groups

Bars show each group’s share of all residents of 3144. For comparison, the line marks Maassluis and the circle the Netherlands.

Turkey

9.2% 710 people

Maassluis 6.2% Netherlands 2.6%
Other Asia Asia excluding Indonesia and Turkey

5.4% 415 people

Maassluis 5.0% Netherlands 5.3%
Morocco

3.5% 270 people

Maassluis 4.6% Netherlands 2.4%
Other Europe Europe excluding the Netherlands, Belgium, Germany and Poland

3.3% 255 people

Maassluis 3.8% Netherlands 5.6%
Suriname

2.3% 175 people

Maassluis 2.2% Netherlands 2.0%
Dutch Caribbean Aruba, Curaçao, Sint Maarten, Bonaire, Sint Eustatius and Saba

2.2% 170 people

Maassluis 2.3% Netherlands 1.1%
Other Africa Africa excluding Morocco

1.9% 145 people

Maassluis 1.8% Netherlands 2.3%
Poland

1.7% 130 people

Maassluis 2.6% Netherlands 1.4%
Indonesia

1.5% 115 people

Maassluis 1.6% Netherlands 1.9%
Germany

1.2% 90 people

Maassluis 1.2% Netherlands 1.9%
Other Americas & Oceania Americas and Oceania excluding Suriname and the Dutch Caribbean

1.2% 90 people

Maassluis 1.2% Netherlands 1.7%
Belgium

0.39% 30 people

Maassluis 0.46% Netherlands 0.76%

First and second generation

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

54% 46%

Born abroad (first generation) 53.6% 1,390
Born in the Netherlands (second generation) 46.2% 1,200

Men and women

Men: 3,765
Women: 3,940

Compared with all postcodes

Netherlands 29.1% 3144 33.7%

Higher than 80% 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

33.7%

3144
Maassluis
Netherlands

Show as table

Year	3144	Maassluis	Netherlands
1998	26.1%	19.8%	16.7%
1999	25.7%	20.3%	17.1%
2000	22.9%	20.8%	17.5%
2001	23.5%	21.4%	18.0%
2002	23.6%	21.8%	18.4%
2003	22.9%	22.1%	18.8%
2004	23.5%	22.4%	19.0%
2005	23.4%	22.7%	19.2%
2006	23.7%	22.8%	19.3%
2007	24.6%	23.0%	19.4%
2008	25.2%	23.0%	19.6%
2009	25.9%	23.3%	19.9%
2010	25.4%	23.7%	20.3%
2011	25.7%	24.3%	20.6%
2012	26.2%	24.6%	20.9%
2013	25.8%	25.0%	21.1%
2014	25.7%	25.6%	21.4%
2015	25.5%	26.1%	21.7%
2016	26.1%	26.3%	22.1%
2017	26.3%	26.9%	22.6%
2018	27.0%	27.3%	23.1%
2019	27.2%	27.8%	23.6%
2020	27.4%	28.6%	24.2%
2021	28.8%	29.0%	24.6%
2022	29.9%	30.1%	26.0%
2023	31.5%	31.3%	27.1%
2024	31.7%	31.8%	27.9%
2025	32.4%	32.5%	28.5%
2026	33.7%	33.2%	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
3181 Rozenburg (Rotterdam)	30.8%	12,620	+5.0 pp	Other Europe
3145 Burgemeesterswijk	31.7%	6,490	−1.5 pp	Morocco
3142 Dijkpolder	39.1%	5,970	+7.9 pp	Other Asia
3143 Taanschuurpolder	28.6%	3,340	+0.9 pp	Other Europe
3147 Wilgenrijk	29.7%	2,325	+15.5 pp	Morocco

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	4,705	3,480	1,230	225	1,005	485	145	85	85	25	80	5	20	120	50	95	35	335	890
1999	4,595	3,415	1,180	220	955	460	160	80	75	20	80	0	15	125	45	95	20	315	865
2000	4,470	3,450	1,025	195	825	385	125	75	85	20	75	0	15	105	45	70	20	290	730
2001	4,475	3,425	1,050	195	860	405	130	70	75	30	75	5	15	100	40	80	30	285	760
2002	4,575	3,495	1,080	195	885	410	120	80	70	25	70	5	10	110	45	100	35	290	795
2003	5,070	3,905	1,160	215	945	440	130	85	90	30	85	0	15	115	40	100	30	325	835
2004	5,175	3,965	1,215	220	1,000	475	145	85	90	25	85	5	15	115	35	110	35	330	885
2005	5,170	3,960	1,210	225	985	475	130	90	90	15	75	5	10	135	40	105	40	330	875
2006	5,195	3,965	1,230	215	1,015	515	125	95	90	20	75	5	15	120	30	105	35	325	910
2007	5,175	3,905	1,275	225	1,050	530	135	95	95	25	75	5	15	130	30	110	30	325	945
2008	5,035	3,770	1,270	220	1,055	530	140	100	95	20	75	5	20	120	30	110	30	330	945
2009	5,115	3,790	1,325	235	1,090	540	150	105	95	20	75	10	15	135	30	110	40	345	980
2010	5,445	4,065	1,385	245	1,140	540	150	115	100	30	80	10	20	135	40	120	45	360	1,025
2011	5,685	4,225	1,460	255	1,200	580	165	110	95	55	85	10	15	145	35	125	35	365	1,095
2012	5,760	4,250	1,510	280	1,230	590	190	110	90	45	90	10	15	165	35	130	40	390	1,120
2013	5,995	4,455	1,545	295	1,250	590	190	115	100	55	90	15	20	170	35	130	35	415	1,125
2014	6,145	4,565	1,580	295	1,285	605	190	115	95	60	95	15	20	165	50	130	40	415	1,165
2015	6,190	4,610	1,580	310	1,270	600	195	115	100	55	90	35	20	165	45	120	40	425	1,155
2016	6,280	4,640	1,640	340	1,300	620	195	110	90	60	90	60	20	170	55	125	45	455	1,185
2017	6,335	4,670	1,665	350	1,315	635	190	115	90	65	95	65	20	170	60	120	40	465	1,200
2018	6,340	4,630	1,710	365	1,345	640	200	110	90	65	95	80	20	170	70	120	50	475	1,230
2019	6,475	4,715	1,760	375	1,385	650	205	120	95	70	95	90	25	165	65	125	55	490	1,270
2020	6,615	4,805	1,810	375	1,435	660	210	125	100	85	90	90	25	170	65	150	40	490	1,320
2021	6,815	4,850	1,965	385	1,580	680	235	130	105	100	90	90	25	180	70	190	70	500	1,460
2022	6,930	4,850	2,075	425	1,655	655	235	160	105	120	95	110	25	195	85	220	75	540	1,510
2023	7,345	5,025	2,315	460	1,860	685	265	180	105	135	90	120	25	220	110	300	80	585	1,705
2024	7,500	5,125	2,380	470	1,910	710	265	175	105	135	90	135	30	220	115	315	85	–	–
2025	7,650	5,165	2,480	485	1,995	700	270	180	105	160	85	130	30	245	130	365	85	–	–
2026	7,705	5,115	2,595	505	2,090	710	270	175	115	170	90	130	30	255	145	415	90	–	–

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