Postcode · Maassluis, South Holland

Postcode 3146: Neighbourhood Steendijkpolder

On 1 January 2026, postcode 3146 in Maassluis (Steendijkpolder) had 4,820 residents. 24.4% of them (1,175 people) have a migration background: they were born abroad or have at least one parent who was. That is lower than Maassluis (33.2%) and lower than the national average (29.1%). The largest origin groups are Poland (3.8%), other Europe (3.4%) and Turkey (2.9%). 46.0% of residents with a migration background were born abroad themselves. Since 2022 the share has risen by 3.7 percentage points.

Residents: 4,820 on 1 January 2026
Migration background: 24.4% 1,175 people
Born abroad: 46.0% 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

76% 24%

Dutch origin 75.5% 3,640
Migration background 24.4% 1,175

Largest origin groups

Bars show each group’s share of all residents of 3146. For comparison, the line marks Maassluis and the circle the Netherlands.

Poland

3.8% 185 people

Maassluis 2.6% Netherlands 1.4%
Other Europe Europe excluding the Netherlands, Belgium, Germany and Poland

3.4% 165 people

Maassluis 3.8% Netherlands 5.6%
Turkey

2.9% 140 people

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

2.9% 140 people

Maassluis 5.0% Netherlands 5.3%
Morocco

2.7% 130 people

Maassluis 4.6% Netherlands 2.4%
Indonesia

2.0% 95 people

Maassluis 1.6% Netherlands 1.9%
Suriname

1.9% 90 people

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

1.2% 60 people

Maassluis 2.3% Netherlands 1.1%
Germany

1.1% 55 people

Maassluis 1.2% Netherlands 1.9%
Other Africa Africa excluding Morocco

0.83% 40 people

Maassluis 1.8% Netherlands 2.3%
Other Americas & Oceania Americas and Oceania excluding Suriname and the Dutch Caribbean

0.83% 40 people

Maassluis 1.2% Netherlands 1.7%
Belgium

0.62% 30 people

Maassluis 0.46% Netherlands 0.76%

First and second generation

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

46% 54%

Born abroad (first generation) 46.0% 540
Born in the Netherlands (second generation) 54.0% 635

Men and women

Men: 2,400
Women: 2,415

Compared with all postcodes

Netherlands 29.1% 3146 24.4%

Higher than 66% 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

24.4%

3146
Maassluis
Netherlands

Show as table

Year	3146	Maassluis	Netherlands
1998	9.6%	19.8%	16.7%
1999	9.6%	20.3%	17.1%
2000	9.8%	20.8%	17.5%
2001	9.9%	21.4%	18.0%
2002	10.0%	21.8%	18.4%
2003	10.5%	22.1%	18.8%
2004	11.1%	22.4%	19.0%
2005	11.2%	22.7%	19.2%
2006	11.3%	22.8%	19.3%
2007	11.9%	23.0%	19.4%
2008	12.3%	23.0%	19.6%
2009	12.5%	23.3%	19.9%
2010	12.7%	23.7%	20.3%
2011	13.7%	24.3%	20.6%
2012	14.3%	24.6%	20.9%
2013	15.0%	25.0%	21.1%
2014	15.8%	25.6%	21.4%
2015	15.8%	26.1%	21.7%
2016	16.2%	26.3%	22.1%
2017	16.8%	26.9%	22.6%
2018	16.9%	27.3%	23.1%
2019	17.2%	27.8%	23.6%
2020	18.6%	28.6%	24.2%
2021	19.5%	29.0%	24.6%
2022	20.7%	30.1%	26.0%
2023	22.2%	31.3%	27.1%
2024	23.0%	31.8%	27.9%
2025	23.9%	32.5%	28.5%
2026	24.4%	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
3151 Hoek van Holland	19.9%	10,515	+3.6 pp	Other Europe
3145 Burgemeesterswijk	31.7%	6,490	−1.5 pp	Morocco
2676 Maasdijk	22.4%	4,650	+4.7 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	6,065	5,485	580	240	330	20	10	75	150	20	120	15	25	80	10	20	25	405	180
1999	6,000	5,425	575	230	345	20	15	70	150	25	105	15	25	85	10	20	35	395	180
2000	5,950	5,370	585	225	360	30	15	80	150	20	100	15	25	85	10	20	35	395	190
2001	5,875	5,295	580	225	360	30	15	80	145	25	100	15	25	85	15	20	30	390	195
2002	5,845	5,260	585	220	360	35	15	80	145	25	95	15	20	90	10	15	35	385	205
2003	5,770	5,170	605	230	370	40	15	80	145	30	95	15	25	95	15	15	30	390	215
2004	5,695	5,065	630	225	405	55	25	80	150	30	90	10	30	95	15	15	35	385	245
2005	5,620	4,985	630	210	420	65	30	80	145	25	90	10	20	90	15	20	40	375	265
2006	5,555	4,925	630	205	430	55	35	85	150	25	95	10	15	85	20	25	35	375	260
2007	5,540	4,880	660	215	445	50	50	90	150	25	95	10	15	95	20	25	35	380	280
2008	5,460	4,790	670	215	460	55	60	90	150	20	85	10	20	100	20	25	40	375	295
2009	5,380	4,710	670	205	465	55	60	95	140	25	80	10	15	100	20	40	30	355	310
2010	5,295	4,620	675	210	460	50	60	105	135	25	80	15	20	95	20	40	25	365	315
2011	5,285	4,555	725	210	510	65	95	100	135	25	80	25	15	90	20	50	20	360	365
2012	5,270	4,515	755	230	535	60	110	100	130	30	80	30	15	105	20	70	15	365	385
2013	5,180	4,405	775	220	545	65	135	105	130	25	75	35	20	90	15	50	20	360	415
2014	5,205	4,385	820	250	570	70	150	100	130	30	70	50	20	110	20	55	15	385	435
2015	5,145	4,330	815	255	560	80	135	100	130	30	70	60	20	105	20	50	15	390	420
2016	5,095	4,270	825	265	560	85	130	100	130	30	70	70	20	105	20	50	15	405	425
2017	5,060	4,210	850	280	570	80	135	100	125	30	70	85	15	110	15	65	20	415	440
2018	5,030	4,180	850	285	565	80	125	105	120	30	65	90	20	110	15	65	25	415	435
2019	4,990	4,130	860	305	555	75	130	95	110	30	60	115	20	110	15	75	25	420	430
2020	4,960	4,035	925	350	575	80	130	95	110	35	60	155	20	115	20	80	25	465	455
2021	4,915	3,955	960	365	595	95	120	90	110	45	55	160	25	125	25	85	25	480	480
2022	4,790	3,795	990	390	605	100	120	85	110	35	55	170	30	135	25	105	25	490	475
2023	4,830	3,760	1,070	415	650	110	125	95	105	40	60	175	30	155	25	115	30	525	515
2024	4,820	3,710	1,110	425	685	115	135	95	105	45	60	175	35	155	30	125	35	–	–
2025	4,810	3,660	1,150	435	715	130	130	95	100	50	60	190	30	155	40	125	40	–	–
2026	4,820	3,640	1,175	435	740	140	130	90	95	60	55	185	30	165	40	140	40	–	–

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