Postcode · Alkmaar, North Holland

Postcode 1821: Neighbourhood Oudorp

On 1 January 2026, postcode 1821 in Alkmaar (Oudorp) had 2,075 residents. 21.4% of them (445 people) have a migration background: they were born abroad or have at least one parent who was. That is lower than Alkmaar (29.1%) and lower than the national average (29.1%). The largest origin groups are other Europe (6.3%), other Asia (2.9%) and Germany (1.9%). 49.4% of residents with a migration background were born abroad themselves. Since 2022 the share has risen by 1.3 percentage points.

Residents: 2,075 on 1 January 2026
Migration background: 21.4% 445 people
Born abroad: 49.4% of those with a migration background
Change since 2022: +1.3 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

78% 21%

Dutch origin 78.3% 1,625
Migration background 21.4% 445

Largest origin groups

Bars show each group’s share of all residents of 1821. For comparison, the line marks Alkmaar and the circle the Netherlands.

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

6.3% 130 people

Alkmaar 6.0% Netherlands 5.6%
Other Asia Asia excluding Indonesia and Turkey

2.9% 60 people

Alkmaar 5.4% Netherlands 5.3%
Germany

1.9% 40 people

Alkmaar 1.7% Netherlands 1.9%
Other Americas & Oceania Americas and Oceania excluding Suriname and the Dutch Caribbean

1.9% 40 people

Alkmaar 2.4% Netherlands 1.7%
Indonesia

1.7% 35 people

Alkmaar 2.1% Netherlands 1.9%
Turkey

1.4% 30 people

Alkmaar 2.7% Netherlands 2.6%
Morocco

1.2% 25 people

Alkmaar 2.3% Netherlands 2.4%
Suriname

1.2% 25 people

Alkmaar 1.6% Netherlands 2.0%
Dutch Caribbean Aruba, Curaçao, Sint Maarten, Bonaire, Sint Eustatius and Saba

1.0% 20 people

Alkmaar 1.3% Netherlands 1.1%
Other Africa Africa excluding Morocco

1.0% 20 people

Alkmaar 2.6% Netherlands 2.3%
Belgium

0.72% 15 people

Alkmaar 0.37% Netherlands 0.76%
Poland

0.24% 5 people

Alkmaar 0.78% Netherlands 1.4%

First and second generation

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

49% 51%

Born abroad (first generation) 49.4% 220
Born in the Netherlands (second generation) 50.6% 225

Men and women

Men: 1,045
Women: 1,030

Compared with all postcodes

Netherlands 29.1% 1821 21.4%

Higher than 60% 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

21.4%

1821
Alkmaar
Netherlands

Show as table

Year	1821	Alkmaar	Netherlands
1998	15.3%	20.1%	16.7%
1999	14.1%	20.5%	17.1%
2000	14.0%	20.8%	17.5%
2001	14.4%	21.4%	18.0%
2002	14.2%	21.8%	18.4%
2003	12.3%	22.1%	18.8%
2004	12.2%	22.5%	19.0%
2005	14.3%	22.5%	19.2%
2006	15.9%	22.5%	19.3%
2007	16.2%	22.4%	19.4%
2008	16.7%	22.6%	19.6%
2009	16.3%	22.8%	19.9%
2010	17.1%	23.1%	20.3%
2011	17.2%	23.3%	20.6%
2012	17.7%	23.4%	20.9%
2013	18.3%	23.5%	21.1%
2014	18.2%	23.5%	21.4%
2015	17.6%	23.6%	21.7%
2016	17.9%	23.9%	22.1%
2017	17.4%	24.4%	22.6%
2018	17.4%	24.6%	23.1%
2019	17.6%	24.6%	23.6%
2020	18.3%	25.0%	24.2%
2021	19.4%	25.3%	24.6%
2022	20.2%	26.7%	26.0%
2023	20.4%	27.6%	27.1%
2024	21.1%	28.2%	27.9%
2025	21.4%	28.6%	28.5%
2026	21.4%	29.1%	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
1813 Overdie	45.7%	8,920	+1.6 pp	Turkey
1823 Oudorp	29.1%	7,535	+1.8 pp	Other Asia
1811 Centrum	27.1%	5,435	+3.3 pp	Other Europe
1829 Centrum, Noord en Oudorp-Oost	17.5%	4,025	+2.2 pp	Other Europe
1812 Overdie	14.0%	215	+0.3 pp	Suriname

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	1,370	1,165	210	90	115	10	40	10	30	5	35	5	5	45	0	10	10	125	80
1999	1,345	1,155	190	80	105	10	40	5	25	5	30	0	5	45	0	10	10	115	75
2000	1,320	1,135	185	75	105	10	40	10	25	5	30	5	5	35	5	5	5	105	80
2001	1,315	1,125	190	75	115	15	40	5	25	5	35	5	0	35	5	10	10	105	85
2002	1,270	1,090	180	70	100	15	35	0	25	5	30	0	5	35	0	10	10	100	70
2003	1,060	925	130	75	60	0	15	0	25	0	25	5	5	40	0	5	15	100	30
2004	985	865	120	65	50	5	10	0	25	0	25	5	5	30	0	0	10	95	25
2005	1,015	870	145	80	65	10	10	0	20	5	30	5	5	40	0	10	10	110	40
2006	1,230	1,035	195	90	100	10	10	0	30	15	35	5	5	45	0	30	5	125	70
2007	1,235	1,035	200	100	110	10	10	5	30	10	35	5	10	50	5	30	10	140	65
2008	1,225	1,015	205	100	100	10	10	5	25	10	30	5	5	60	5	25	10	135	70
2009	1,230	1,020	200	105	95	10	10	10	25	10	30	10	10	55	0	30	0	130	75
2010	1,230	1,015	210	100	115	20	10	5	20	10	30	5	5	60	0	40	10	130	80
2011	1,280	1,060	220	120	95	15	10	5	25	10	25	5	5	85	0	25	5	145	80
2012	1,300	1,070	230	120	110	15	10	10	20	10	25	5	10	80	0	35	10	145	85
2013	1,285	1,050	235	120	110	15	10	10	25	10	30	10	10	70	5	30	5	145	85
2014	1,320	1,080	240	115	125	20	15	10	30	5	25	10	10	70	5	30	10	150	90
2015	1,450	1,195	255	125	130	15	15	10	35	10	25	10	5	85	5	30	10	160	95
2016	1,560	1,280	280	135	145	20	15	15	35	5	30	10	5	90	5	35	15	175	105
2017	1,635	1,350	285	130	150	25	10	15	35	10	30	10	5	85	5	40	10	170	110
2018	1,640	1,355	285	120	160	25	15	20	35	15	25	10	5	80	5	35	10	160	125
2019	1,650	1,360	290	125	165	25	10	20	35	15	30	10	5	80	5	35	20	170	120
2020	1,640	1,340	300	130	170	25	15	15	40	15	30	5	10	85	0	35	25	175	125
2021	1,650	1,330	320	140	180	20	15	20	35	20	30	10	10	90	0	45	25	185	140
2022	1,660	1,325	335	135	200	15	15	25	35	20	35	10	10	85	5	50	30	190	130
2023	1,690	1,340	345	150	195	20	10	25	35	15	35	10	10	90	10	45	30	190	130
2024	1,660	1,310	350	165	185	20	15	25	30	15	40	10	10	100	10	40	30	–	–
2025	1,730	1,360	370	175	195	20	15	25	30	20	40	15	10	110	10	45	30	–	–
2026	2,075	1,625	445	190	255	30	25	25	35	20	40	5	15	130	20	60	40	–	–

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