Postcode · Leimuiden, South Holland

Postcode 2451: Migration background and origin

On 1 January 2026, postcode 2451 in Leimuiden had 4,885 residents. 20.5% of them (1,000 people) have a migration background: they were born abroad or have at least one parent who was. That is higher than the municipality of Kaag en Braassem (16.9%) and lower than the national average (29.1%). The largest origin groups are other Europe (5.6%), Poland (3.4%) and other Asia (3.3%). 62.0% of residents with a migration background were born abroad themselves. Since 2022 the share has risen by 3.5 percentage points.

Residents: 4,885 on 1 January 2026
Migration background: 20.5% 1,000 people
Born abroad: 62.0% of those with a migration background
Change since 2022: +3.5 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

80% 20%

Dutch origin 79.6% 3,890
Migration background 20.5% 1,000

Largest origin groups

Bars show each group’s share of all residents of 2451. For comparison, the line marks Kaag en Braassem and the circle the Netherlands.

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

5.6% 275 people

Kaag en Braassem 3.5% Netherlands 5.6%
Poland

3.4% 165 people

Kaag en Braassem 2.2% Netherlands 1.4%
Other Asia Asia excluding Indonesia and Turkey

3.3% 160 people

Kaag en Braassem 3.5% Netherlands 5.3%
Indonesia

1.8% 90 people

Kaag en Braassem 1.2% Netherlands 1.9%
Other Americas & Oceania Americas and Oceania excluding Suriname and the Dutch Caribbean

1.5% 75 people

Kaag en Braassem 1.1% Netherlands 1.7%
Other Africa Africa excluding Morocco

1.2% 60 people

Kaag en Braassem 1.3% Netherlands 2.3%
Germany

1.0% 50 people

Kaag en Braassem 0.92% Netherlands 1.9%
Morocco

0.82% 40 people

Kaag en Braassem 0.83% Netherlands 2.4%
Suriname

0.61% 30 people

Kaag en Braassem 1.0% Netherlands 2.0%
Dutch Caribbean Aruba, Curaçao, Sint Maarten, Bonaire, Sint Eustatius and Saba

0.51% 25 people

Kaag en Braassem 0.44% Netherlands 1.1%
Turkey

0.31% 15 people

Kaag en Braassem 0.58% Netherlands 2.6%
Belgium

0.31% 15 people

Kaag en Braassem 0.27% Netherlands 0.76%

First and second generation

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

62% 38%

Born abroad (first generation) 62.0% 620
Born in the Netherlands (second generation) 38.0% 380

Men and women

Men: 2,440
Women: 2,445

Compared with all postcodes

Netherlands 29.1% 2451 20.5%

Higher than 57% 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

20.5%

2451
Kaag en Braassem
Netherlands

Show as table

Year	2451	Kaag en Braassem	Netherlands
1998	6.2%	5.7%	16.7%
1999	6.0%	5.8%	17.1%
2000	6.0%	5.7%	17.5%
2001	6.3%	6.0%	18.0%
2002	6.4%	6.0%	18.4%
2003	6.3%	6.2%	18.8%
2004	6.5%	6.3%	19.0%
2005	6.7%	6.5%	19.2%
2006	6.8%	6.6%	19.3%
2007	7.1%	6.7%	19.4%
2008	7.2%	6.8%	19.6%
2009	7.3%	7.1%	19.9%
2010	7.9%	7.3%	20.3%
2011	8.3%	7.7%	20.6%
2012	8.9%	7.9%	20.9%
2013	9.5%	8.1%	21.1%
2014	9.8%	8.4%	21.4%
2015	10.5%	8.9%	21.7%
2016	11.2%	9.4%	22.1%
2017	12.4%	10.2%	22.6%
2018	14.0%	10.9%	23.1%
2019	14.5%	11.3%	23.6%
2020	15.3%	11.9%	24.2%
2021	15.6%	12.6%	24.6%
2022	17.0%	14.1%	26.0%
2023	18.1%	15.5%	27.1%
2024	19.8%	16.1%	27.9%
2025	20.3%	16.6%	28.5%
2026	20.5%	16.9%	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
1431 Stommeer, Hornmeer	26.3%	13,630	+3.7 pp	Other Europe
2461 Langeraar	15.3%	9,775	+2.5 pp	Other Asia
1433 Kudelstraat en Kalslagen	24.4%	9,235	+3.5 pp	Other Asia
1424 Meerwijk	22.5%	5,040	+6.5 pp	Other Europe
2377 Roelofarendsveen	19.5%	3,825	+4.6 pp	Other Asia
2465 Rijnsaterwoude	15.5%	1,290	−0.1 pp	Other Europe
2156 Burgerveen / Leimuiderbrug / Weteringbrug	15.5%	355	−0.3 pp	Suriname
2155 Burgerveen / Leimuiderbrug / Weteringbrug	20.0%	50	+11.7 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	4,540	4,265	280	120	155	0	0	15	65	0	65	5	10	40	15	35	25	205	75
1999	4,520	4,245	270	120	145	0	0	20	65	5	65	5	10	40	15	35	5	200	75
2000	4,505	4,235	270	130	155	0	0	10	65	5	60	5	15	50	20	30	25	200	70
2001	4,455	4,175	280	135	150	0	5	10	70	5	60	5	10	60	15	25	20	215	65
2002	4,435	4,155	285	140	140	0	0	5	70	5	60	10	15	55	15	25	20	225	60
2003	4,365	4,090	275	135	140	0	0	10	65	5	60	10	15	50	15	25	20	220	60
2004	4,375	4,095	285	135	155	0	0	5	65	0	55	10	10	60	15	40	30	215	75
2005	4,405	4,110	295	140	145	0	0	5	65	5	55	20	10	55	15	40	15	220	75
2006	4,425	4,120	300	145	165	0	0	5	65	5	55	20	10	60	10	55	25	220	80
2007	4,385	4,075	310	150	160	0	0	5	65	5	60	25	10	55	10	50	25	235	80
2008	4,355	4,040	315	175	135	0	0	5	60	5	65	40	10	60	5	35	25	255	60
2009	4,310	3,995	315	170	150	0	0	10	55	10	65	40	10	55	15	40	20	245	70
2010	4,305	3,965	340	185	155	0	0	10	55	5	65	35	15	70	15	40	30	265	80
2011	4,275	3,915	355	175	175	0	5	10	60	5	70	50	5	50	20	50	25	255	105
2012	4,415	4,020	395	205	190	5	5	15	65	5	65	60	10	70	20	45	30	285	115
2013	4,440	4,020	420	215	215	10	5	15	65	5	65	70	10	70	20	60	35	300	120
2014	4,410	3,980	430	210	220	5	5	15	65	5	65	70	10	65	30	55	40	295	125
2015	4,415	3,950	465	245	220	5	5	10	60	5	65	100	10	70	30	60	45	325	135
2016	4,425	3,930	495	270	225	5	15	15	70	10	65	115	10	80	25	45	40	355	145
2017	4,480	3,925	555	290	265	5	15	20	65	10	60	140	10	80	40	75	35	380	180
2018	4,605	3,960	645	330	320	5	20	20	70	10	60	155	15	100	45	85	65	420	220
2019	4,595	3,930	665	340	320	5	15	25	70	15	60	160	10	110	50	90	50	430	230
2020	4,635	3,925	710	380	330	5	20	25	75	15	60	180	10	130	45	95	50	480	230
2021	4,605	3,885	720	375	350	5	25	30	75	15	55	175	10	135	50	95	55	470	250
2022	4,600	3,820	780	385	400	5	35	30	85	25	50	180	15	135	50	120	55	470	275
2023	4,725	3,870	855	420	430	5	35	35	85	25	45	185	15	175	60	125	60	515	305
2024	4,825	3,870	955	500	450	10	35	35	80	25	50	180	15	260	60	150	60	–	–
2025	4,855	3,870	985	515	470	10	35	35	90	25	50	175	15	280	55	155	65	–	–
2026	4,885	3,890	1,000	505	495	15	40	30	90	25	50	165	15	275	60	160	75	–	–

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