Postcode · Leiden, South Holland

Postcode 2321: Neighbourhoods Bos- en Gasthuisdistrict and Roodenburgerdistrict

On 1 January 2026, postcode 2321 in Leiden (Bos- en Gasthuisdistrict and Roodenburgerdistrict) had 13,420 residents. 42.5% of them (5,710 people) have a migration background: they were born abroad or have at least one parent who was. That is higher than Leiden (38.2%) and higher than the national average (29.1%). The largest origin groups are other Europe (9.4%), other Asia (8.9%) and Morocco (5.5%). 63.1% of residents with a migration background were born abroad themselves. Since 2022 the share has risen by 5.4 percentage points.

Residents: 13,420 on 1 January 2026
Migration background: 42.5% 5,710 people
Born abroad: 63.1% of those with a migration background
Change since 2022: +5.4 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

57% 43%

Dutch origin 57.5% 7,710
Migration background 42.5% 5,710

Largest origin groups

Bars show each group’s share of all residents of 2321. For comparison, the line marks Leiden and the circle the Netherlands.

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

9.4% 1,255 people

Leiden 9.6% Netherlands 5.6%
Other Asia Asia excluding Indonesia and Turkey

8.9% 1,195 people

Leiden 7.4% Netherlands 5.3%
Morocco

5.5% 740 people

Leiden 4.2% Netherlands 2.4%
Other Africa Africa excluding Morocco

3.6% 480 people

Leiden 3.0% Netherlands 2.3%
Other Americas & Oceania Americas and Oceania excluding Suriname and the Dutch Caribbean

3.0% 400 people

Leiden 3.2% Netherlands 1.7%
Turkey

2.6% 355 people

Leiden 2.0% Netherlands 2.6%
Indonesia

2.0% 265 people

Leiden 2.4% Netherlands 1.9%
Suriname

1.9% 255 people

Leiden 1.4% Netherlands 2.0%
Dutch Caribbean Aruba, Curaçao, Sint Maarten, Bonaire, Sint Eustatius and Saba

1.8% 240 people

Leiden 1.1% Netherlands 1.1%
Germany

1.7% 230 people

Leiden 2.0% Netherlands 1.9%
Poland

1.4% 185 people

Leiden 1.2% Netherlands 1.4%
Belgium

0.82% 110 people

Leiden 0.73% Netherlands 0.76%

First and second generation

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

63% 37%

Born abroad (first generation) 63.1% 3,605
Born in the Netherlands (second generation) 36.9% 2,105

Men and women

Men: 6,630
Women: 6,790

Compared with all postcodes

Netherlands 29.1% 2321 42.5%

Higher than 87% 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

42.5%

2321
Leiden
Netherlands

Show as table

Year	2321	Leiden	Netherlands
1998	23.5%	21.2%	16.7%
1999	24.0%	21.7%	17.1%
2000	24.8%	22.5%	17.5%
2001	25.4%	23.1%	18.0%
2002	26.2%	24.0%	18.4%
2003	27.3%	24.8%	18.8%
2004	28.1%	25.4%	19.0%
2005	28.7%	25.7%	19.2%
2006	29.2%	25.9%	19.3%
2007	29.4%	26.1%	19.4%
2008	30.1%	26.6%	19.6%
2009	31.5%	27.2%	19.9%
2010	32.5%	27.4%	20.3%
2011	32.8%	27.9%	20.6%
2012	32.9%	28.3%	20.9%
2013	32.9%	28.5%	21.1%
2014	33.4%	29.0%	21.4%
2015	33.4%	29.3%	21.7%
2016	32.9%	29.8%	22.1%
2017	33.7%	30.2%	22.6%
2018	34.3%	30.6%	23.1%
2019	34.7%	31.3%	23.6%
2020	35.4%	32.2%	24.2%
2021	36.2%	32.2%	24.6%
2022	37.1%	34.0%	26.0%
2023	39.2%	35.6%	27.1%
2024	40.9%	36.5%	27.9%
2025	41.7%	37.5%	28.5%
2026	42.5%	38.2%	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
2313 Roodenburgerdistrict	27.1%	12,175	+2.8 pp	Other Europe
2311 Binnenstad-Zuid	36.3%	11,250	+2.9 pp	Other Europe
2332 Morsdistrict	41.9%	10,980	+6.6 pp	Other Asia
2324 Bos- en Gasthuisdistrict	39.9%	9,845	+2.0 pp	Other Asia
2314 Roodenburgerdistrict	32.5%	6,055	+1.6 pp	Other Europe
2322 Bos- en Gasthuisdistrict	22.2%	225	−3.4 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	7,825	5,995	1,835	390	1,440	265	485	130	235	70	140	10	30	210	80	130	45	650	1,180
1999	7,770	5,910	1,865	405	1,460	260	470	145	230	65	150	10	35	210	95	135	60	665	1,200
2000	7,635	5,745	1,890	390	1,505	265	460	155	235	80	140	10	30	210	115	130	65	670	1,220
2001	8,020	5,980	2,040	425	1,605	265	465	165	255	100	140	10	35	240	130	150	75	725	1,315
2002	8,330	6,150	2,180	460	1,715	290	515	150	260	110	135	15	35	275	140	170	80	765	1,420
2003	8,450	6,140	2,310	485	1,820	310	540	150	255	115	130	20	45	290	160	200	90	795	1,515
2004	8,520	6,125	2,395	485	1,910	320	565	145	270	120	130	15	40	300	180	215	95	815	1,585
2005	8,495	6,060	2,435	475	1,965	310	615	155	260	105	130	15	50	280	185	225	110	800	1,635
2006	8,375	5,930	2,445	495	1,950	320	625	155	255	90	125	30	50	290	180	220	105	810	1,635
2007	8,350	5,895	2,455	495	1,955	310	595	165	245	95	125	30	50	290	195	250	100	800	1,655
2008	8,245	5,765	2,480	545	1,930	300	555	170	235	85	130	35	45	335	235	250	100	845	1,640
2009	8,070	5,525	2,545	560	1,990	290	635	170	230	80	125	35	40	360	215	270	100	840	1,705
2010	8,150	5,510	2,645	580	2,060	285	625	175	235	85	125	30	45	380	230	315	110	875	1,765
2011	8,150	5,480	2,670	585	2,090	275	625	160	230	110	125	35	50	375	265	325	100	865	1,805
2012	8,330	5,590	2,740	605	2,135	285	645	165	235	105	125	50	55	375	260	330	110	895	1,850
2013	8,470	5,675	2,790	645	2,145	270	655	165	240	95	130	55	60	400	280	320	120	940	1,845
2014	8,705	5,800	2,905	695	2,210	285	670	155	245	105	135	70	55	435	285	335	130	1,005	1,895
2015	8,685	5,780	2,905	725	2,180	270	660	155	245	95	135	75	50	465	285	345	125	1,035	1,870
2016	9,855	6,610	3,245	800	2,440	300	680	175	265	110	145	80	65	510	325	430	155	1,145	2,095
2017	9,995	6,630	3,365	870	2,495	290	665	180	260	115	145	90	65	570	340	495	150	1,200	2,160
2018	9,955	6,540	3,415	920	2,490	285	675	180	250	105	150	95	65	610	345	505	145	1,250	2,160
2019	10,315	6,735	3,580	975	2,605	285	685	190	270	100	165	105	60	645	355	550	170	1,330	2,250
2020	10,945	7,065	3,880	1,085	2,795	295	700	200	265	135	175	110	70	730	380	610	210	1,450	2,425
2021	10,875	6,935	3,940	1,095	2,845	300	695	210	265	140	170	120	70	735	375	650	210	1,460	2,475
2022	11,715	7,370	4,350	1,175	3,170	305	715	225	280	165	185	120	80	795	415	795	270	1,570	2,665
2023	12,320	7,490	4,830	1,415	3,415	310	735	235	265	175	200	150	85	985	430	950	315	1,815	2,910
2024	12,795	7,560	5,235	1,550	3,685	325	740	250	275	210	210	155	90	1,095	440	1,060	385	–	–
2025	13,465	7,850	5,615	1,710	3,905	345	750	260	265	235	225	160	110	1,215	480	1,150	425	–	–
2026	13,420	7,710	5,710	1,780	3,930	355	740	255	265	240	230	185	110	1,255	480	1,195	400	–	–

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