City · Westland, South Holland

De Lier: Migration background and origin

On 1 January 2026, De Lier had 13,470 residents. 16.4% of them (2,205 people) have a migration background: they were born abroad or have at least one parent who was. That is lower than the municipality of Westland (21.4%) and lower than the national average (29.1%). The largest origin groups are other Europe (4.8%), Poland (3.0%) and other Asia (2.6%). 66.7% of residents with a migration background were born abroad themselves. Since 2022 the share has risen by 4.2 percentage points.

Residents: 13,470 on 1 January 2026
Migration background: 16.4% 2,205 people
Born abroad: 66.7% of those with a migration background
Change since 2022: +4.2 pp in share with a migration background

Migration background, share of residents

Share of residents with a migration background per postcode.

Where residents come from

Origin of residents on 1 January 2026, as a share of all residents.

Dutch origin and migration background

84% 16%

Dutch origin 83.7% 11,270
Migration background 16.4% 2,205

Largest origin groups

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

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

4.8% 645 people

Westland 5.5% Netherlands 5.6%
Poland

3.0% 400 people

Westland 3.4% Netherlands 1.4%
Other Asia Asia excluding Indonesia and Turkey

2.6% 345 people

Westland 3.0% Netherlands 5.3%
Morocco

1.2% 160 people

Westland 1.7% Netherlands 2.4%
Other Africa Africa excluding Morocco

1.0% 130 people

Westland 1.1% Netherlands 2.3%
Suriname

0.85% 115 people

Westland 1.3% Netherlands 2.0%
Germany

0.74% 100 people

Westland 0.93% Netherlands 1.9%
Turkey

0.67% 90 people

Westland 1.6% Netherlands 2.6%
Other Americas & Oceania Americas and Oceania excluding Suriname and the Dutch Caribbean

0.67% 90 people

Westland 0.92% Netherlands 1.7%
Indonesia

0.52% 70 people

Westland 1.1% Netherlands 1.9%
Dutch Caribbean Aruba, Curaçao, Sint Maarten, Bonaire, Sint Eustatius and Saba

0.33% 45 people

Westland 0.57% Netherlands 1.1%
Belgium

0.15% 20 people

Westland 0.25% Netherlands 0.76%

First and second generation

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

67% 33%

Born abroad (first generation) 66.7% 1,470
Born in the Netherlands (second generation) 33.3% 735

Men and women

Men: 6,735
Women: 6,735

Compared with all cities

Netherlands 29.1% De Lier 16.4%

Higher than 70% of all cities in the Netherlands

Trend since 1998

Share of residents with a migration background, compared with larger areas.

Show

Measure % Residents

New CBS classification

16.4%

De Lier
Westland
Netherlands

Show as table

Year	De Lier	Westland	Netherlands
1998	7.3%	7.6%	16.7%
1999	7.3%	7.8%	17.1%
2000	7.9%	8.1%	17.5%
2001	7.9%	8.2%	18.0%
2002	8.7%	8.4%	18.4%
2003	9.6%	8.7%	18.8%
2004	6.3%	8.4%	19.0%
2005	6.3%	8.6%	19.2%
2006	6.4%	8.8%	19.3%
2007	6.3%	9.0%	19.4%
2008	6.7%	9.4%	19.6%
2009	6.9%	9.5%	19.9%
2010	7.1%	9.8%	20.3%
2011	7.3%	10.1%	20.6%
2012	8.5%	12.1%	20.9%
2013	8.9%	12.6%	21.1%
2014	8.7%	13.0%	21.4%
2015	9.2%	13.7%	21.7%
2016	10.1%	14.0%	22.1%
2017	10.1%	14.2%	22.6%
2018	10.7%	15.1%	23.1%
2019	10.8%	15.4%	23.6%
2020	11.3%	16.0%	24.2%
2021	11.4%	16.4%	24.6%
2022	12.1%	17.4%	26.0%
2023	13.9%	18.9%	27.1%
2024	14.8%	19.5%	27.9%
2025	15.5%	20.2%	28.5%
2026	16.4%	21.4%	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).

Postcodes in De Lier

				Largest group
2678 Bleyenburg	16.4%	13,470	+4.2 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	11,115	10,305	810	240	570	35	130	40	75	5	105	15	25	95	115	140	30	335	480
1999	11,155	10,340	815	245	565	35	140	45	75	5	110	15	25	95	95	135	35	340	475
2000	11,190	10,310	880	280	595	35	135	45	70	10	115	15	30	120	105	165	30	365	520
2001	11,185	10,300	885	280	600	40	135	45	70	10	110	15	30	125	110	160	30	365	520
2002	11,335	10,350	990	320	670	35	130	40	75	5	105	20	30	165	125	215	45	410	575
2003	11,375	10,280	1,095	345	745	40	125	40	75	5	105	20	25	195	135	280	45	435	660
2004	11,730	10,990	740	280	460	30	125	45	70	5	105	25	25	125	45	90	50	375	365
2005	11,800	11,065	740	290	445	30	125	40	75	5	100	30	25	135	35	90	45	385	355
2006	11,820	11,070	755	295	455	30	120	40	80	10	100	45	25	125	35	90	50	395	355
2007	11,790	11,045	745	295	440	25	130	40	70	10	100	45	25	125	25	90	50	385	355
2008	11,925	11,125	800	335	460	30	125	45	70	10	95	90	25	125	35	100	45	425	375
2009	11,865	11,045	820	355	470	35	125	40	75	10	95	95	20	145	35	95	55	450	375
2010	11,780	10,940	835	360	480	35	125	45	70	5	95	95	25	145	40	105	55	455	385
2011	11,765	10,915	855	365	490	35	120	55	70	5	95	105	20	145	45	110	50	450	405
2012	11,865	10,855	1,010	510	505	40	125	55	70	5	95	260	25	130	45	110	55	600	405
2013	11,905	10,845	1,060	570	490	40	130	45	70	5	95	305	20	150	45	105	50	660	400
2014	11,980	10,935	1,045	550	495	35	125	40	65	10	90	290	25	145	55	115	50	640	405
2015	12,010	10,900	1,110	615	500	30	115	50	70	5	85	340	20	170	60	120	50	705	405
2016	12,225	10,990	1,235	700	530	35	120	50	70	5	85	425	20	170	65	125	60	795	430
2017	12,220	10,985	1,235	685	550	30	125	60	70	5	90	400	20	175	70	140	50	775	465
2018	12,335	11,020	1,315	725	590	30	125	60	70	10	80	425	25	195	80	155	60	815	500
2019	12,395	11,060	1,335	720	615	35	120	60	70	10	90	385	20	225	105	160	55	805	530
2020	12,515	11,100	1,415	780	640	40	120	65	65	10	85	440	20	235	110	175	55	870	550
2021	12,480	11,055	1,425	750	670	30	125	70	65	20	85	390	25	250	115	190	55	835	585
2022	12,455	10,945	1,510	755	755	40	125	70	65	20	85	395	20	250	120	240	65	845	620
2023	12,835	11,045	1,785	960	830	45	130	85	65	20	90	380	20	465	130	280	70	1,065	675
2024	13,130	11,195	1,940	1,010	925	60	145	95	70	30	100	375	20	515	130	315	80	–	–
2025	13,305	11,245	2,060	1,060	1,000	80	155	105	65	45	100	370	20	570	130	340	85	–	–
2026	13,470	11,270	2,205	1,165	1,035	90	160	115	70	45	100	400	20	645	130	345	90	–	–

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