Postcode · Katwoude, North Holland

Postcode 1145: Migration background and origin

On 1 January 2026, postcode 1145 in Katwoude had 515 residents. 47.6% of them (245 people) have a migration background: they were born abroad or have at least one parent who was. That is higher than the municipality of Waterland (19.2%) and higher than the national average (29.1%). The largest origin groups are other Asia (20.4%), other Africa (7.8%) and Turkey (5.8%). 85.7% of residents with a migration background were born abroad themselves. Since 2022 the share has risen by 32.2 percentage points.

Residents: 515 on 1 January 2026
Migration background: 47.6% 245 people
Born abroad: 85.7% of those with a migration background
Change since 2022: +32.2 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

52% 48%

Dutch origin 52.4% 270
Migration background 47.6% 245

Largest origin groups

Bars show each group’s share of all residents of 1145. For comparison, the line marks Waterland and the circle the Netherlands.

Other Asia Asia excluding Indonesia and Turkey

20.4% 105 people

Waterland 3.9% Netherlands 5.3%
Other Africa Africa excluding Morocco

7.8% 40 people

Waterland 1.7% Netherlands 2.3%
Turkey

5.8% 30 people

Waterland 0.59% Netherlands 2.6%
Other Europe Europe excluding the Netherlands, Belgium, Germany and Poland

3.9% 20 people

Waterland 5.5% Netherlands 5.6%
Other Americas & Oceania Americas and Oceania excluding Suriname and the Dutch Caribbean

3.9% 20 people

Waterland 1.8% Netherlands 1.7%
Morocco

1.9% 10 people

Waterland 0.39% Netherlands 2.4%
Indonesia

1.0% 5 people

Waterland 1.8% Netherlands 1.9%
Germany

1.0% 5 people

Waterland 1.7% Netherlands 1.9%
Suriname

0.0% 0 people

Waterland 0.79% Netherlands 2.0%
Dutch Caribbean Aruba, Curaçao, Sint Maarten, Bonaire, Sint Eustatius and Saba

0.0% 0 people

Waterland 0.28% Netherlands 1.1%
Poland

0.0% 0 people

Waterland 0.28% Netherlands 1.4%
Belgium

0.0% 0 people

Waterland 0.31% Netherlands 0.76%

First and second generation

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

86% 14%

Born abroad (first generation) 85.7% 210
Born in the Netherlands (second generation) 14.3% 35

Men and women

Men: 280
Women: 235

Compared with all postcodes

Netherlands 29.1% 1145 47.6%

Higher than 91% 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

47.6%

1145
Waterland
Netherlands

Show as table

Year	1145	Waterland	Netherlands
1998	8.7%	9.0%	16.7%
1999	10.4%	9.0%	17.1%
2000	8.3%	9.2%	17.5%
2001	12.0%	9.3%	18.0%
2002	8.3%	9.4%	18.4%
2003	6.5%	9.3%	18.8%
2004	6.7%	9.6%	19.0%
2005	6.4%	9.8%	19.2%
2006	8.7%	9.9%	19.3%
2007	8.7%	10.0%	19.4%
2008	9.3%	10.2%	19.6%
2009	9.3%	10.3%	19.9%
2010	6.8%	10.7%	20.3%
2011	6.8%	10.9%	20.6%
2012	6.7%	10.9%	20.9%
2013	6.4%	11.1%	21.1%
2014	6.5%	11.3%	21.4%
2015	7.5%	11.5%	21.7%
2016	13.1%	12.0%	22.1%
2017	12.7%	12.3%	22.6%
2018	12.5%	12.4%	23.1%
2019	12.3%	12.9%	23.6%
2020	12.3%	13.5%	24.2%
2021	13.4%	13.7%	24.6%
2022	15.4%	14.9%	26.0%
2023	16.9%	16.8%	27.1%
2024	16.7%	17.4%	27.9%
2025	29.9%	18.3%	28.5%
2026	47.6%	19.2%	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
1141 Monnickendam	20.5%	9,840	+4.6 pp	Other Europe
1131 Oude kom	10.7%	9,090	+3.1 pp	Other Europe
1135 Oude kom	21.9%	7,250	+2.2 pp	Other Asia
1482 Monnickendam	6.9%	145	−3.4 pp	Germany
1481 Purmerpolder	9.5%	105	+5.0 pp	Germany

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	Belgium	Other Europe	Other Africa	Other Asia	Other Americas & Oceania	Western migration background	Non-Western migration background
1998	230	215	20	5	15	0	5	0	0	0	0	0	5	0	5	5	10	10
1999	240	215	25	10	10	0	5	0	5	0	5	0	5	0	0	0	15	10
2000	240	215	20	5	15	5	10	0	5	0	5	0	0	0	0	0	10	5
2001	250	220	30	10	20	5	5	0	5	0	5	0	5	5	0	0	15	10
2002	240	215	20	15	10	0	5	0	5	0	5	0	10	0	0	0	15	10
2003	230	210	15	5	5	0	5	0	0	0	5	0	0	0	0	0	10	10
2004	225	215	15	0	10	0	10	0	5	0	0	0	0	0	0	0	10	10
2005	235	215	15	0	15	0	10	5	5	0	5	0	0	0	0	0	10	10
2006	230	210	20	5	15	0	10	0	5	0	5	0	0	0	0	0	10	10
2007	230	210	20	5	15	0	5	0	0	0	0	0	5	0	5	5	10	10
2008	215	200	20	5	15	0	5	0	0	0	0	0	5	0	5	5	10	10
2009	215	195	20	5	10	0	5	5	0	0	5	0	0	0	5	0	10	5
2010	220	205	15	5	15	0	5	5	5	0	5	5	0	0	0	0	10	10
2011	220	200	15	5	5	0	5	0	5	0	5	0	0	0	0	0	10	5
2012	225	205	15	5	10	0	5	0	0	0	5	0	0	0	5	0	15	5
2013	235	215	15	5	15	0	5	0	5	0	5	0	0	0	0	5	10	10
2014	230	215	15	5	10	0	5	5	0	0	5	0	0	0	0	0	10	10
2015	265	245	20	5	15	0	5	5	5	0	5	0	0	5	0	0	15	10
2016	305	265	40	5	35	0	15	0	5	0	0	5	0	0	10	5	15	25
2017	315	275	40	10	25	0	15	0	10	0	0	0	10	0	0	0	15	25
2018	320	280	40	5	35	0	15	0	5	0	0	5	0	0	10	5	15	20
2019	325	285	40	15	25	0	15	0	10	0	0	0	15	0	0	5	20	20
2020	325	285	40	15	30	0	10	5	5	0	5	0	10	0	5	5	15	20
2021	335	290	45	15	30	0	10	5	5	5	5	0	10	5	5	0	20	25
2022	325	275	50	15	35	0	15	5	5	0	0	5	5	0	5	10	20	30
2023	325	270	55	15	35	0	15	0	5	0	5	0	10	0	5	5	25	25
2024	330	275	55	20	35	0	15	5	5	0	5	5	10	0	5	5	–	–
2025	385	270	115	20	100	15	15	5	5	0	5	0	10	15	35	15	–	–
2026	515	270	245	25	220	30	10	0	5	0	5	0	20	40	105	20	–	–

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