Postcode · Uithoorn, North Holland

Postcode 1421: Neighbourhoods Thamerdal, Legmeer and Dorpscentrum

On 1 January 2026, postcode 1421 in Uithoorn (Thamerdal, Legmeer and Dorpscentrum) had 6,195 residents. 40.6% of them (2,515 people) have a migration background: they were born abroad or have at least one parent who was. That is higher than Uithoorn (39.5%) and higher than the national average (29.1%). The largest origin groups are other Asia (13.1%), other Europe (6.3%) and Morocco (3.5%). 61.4% of residents with a migration background were born abroad themselves. Since 2022 the share has risen by 3.7 percentage points.

Residents: 6,195 on 1 January 2026
Migration background: 40.6% 2,515 people
Born abroad: 61.4% of those with a migration background
Change since 2022: +3.7 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

59% 41%

Dutch origin 59.5% 3,685
Migration background 40.6% 2,515

Largest origin groups

Bars show each group’s share of all residents of 1421. For comparison, the line marks Uithoorn and the circle the Netherlands.

Other Asia Asia excluding Indonesia and Turkey

13.1% 810 people

Uithoorn 12.4% Netherlands 5.3%
Other Europe Europe excluding the Netherlands, Belgium, Germany and Poland

6.3% 390 people

Uithoorn 6.1% Netherlands 5.6%
Morocco

3.5% 215 people

Uithoorn 3.6% Netherlands 2.4%
Suriname

3.5% 215 people

Uithoorn 2.9% Netherlands 2.0%
Poland

3.4% 210 people

Uithoorn 2.6% Netherlands 1.4%
Other Africa Africa excluding Morocco

3.2% 200 people

Uithoorn 3.5% Netherlands 2.3%
Other Americas & Oceania Americas and Oceania excluding Suriname and the Dutch Caribbean

2.2% 135 people

Uithoorn 2.3% Netherlands 1.7%
Indonesia

1.9% 120 people

Uithoorn 2.3% Netherlands 1.9%
Turkey

1.3% 80 people

Uithoorn 1.4% Netherlands 2.6%
Germany

1.2% 75 people

Uithoorn 1.3% Netherlands 1.9%
Dutch Caribbean Aruba, Curaçao, Sint Maarten, Bonaire, Sint Eustatius and Saba

0.81% 50 people

Uithoorn 0.85% Netherlands 1.1%
Belgium

0.32% 20 people

Uithoorn 0.37% Netherlands 0.76%

First and second generation

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

61% 38%

Born abroad (first generation) 61.4% 1,545
Born in the Netherlands (second generation) 38.4% 965

Men and women

Men: 2,995
Women: 3,200

Compared with all postcodes

Netherlands 29.1% 1421 40.6%

Higher than 86% 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

40.6%

1421
Uithoorn
Netherlands

Show as table

Year	1421	Uithoorn	Netherlands
1998	15.6%	16.9%	16.7%
1999	15.9%	17.1%	17.1%
2000	16.1%	17.4%	17.5%
2001	16.1%	17.4%	18.0%
2002	16.3%	17.7%	18.4%
2003	16.8%	18.1%	18.8%
2004	16.9%	18.3%	19.0%
2005	17.2%	18.7%	19.2%
2006	18.1%	18.8%	19.3%
2007	18.4%	19.3%	19.4%
2008	18.6%	19.5%	19.6%
2009	19.1%	20.0%	19.9%
2010	20.7%	20.8%	20.3%
2011	21.8%	21.3%	20.6%
2012	22.9%	21.8%	20.9%
2013	23.6%	22.4%	21.1%
2014	24.5%	22.9%	21.4%
2015	25.6%	24.0%	21.7%
2016	27.2%	25.2%	22.1%
2017	27.7%	25.8%	22.6%
2018	29.2%	27.1%	23.1%
2019	30.6%	28.4%	23.6%
2020	32.2%	29.5%	24.2%
2021	33.5%	31.2%	24.6%
2022	36.9%	34.3%	26.0%
2023	38.2%	36.1%	27.1%
2024	39.0%	37.2%	27.9%
2025	39.9%	38.6%	28.5%
2026	40.6%	39.5%	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
1422 Zijdelwaard, Legmeer	44.0%	15,505	+6.2 pp	Other Asia
1423 Meerwijk	25.7%	5,465	+3.7 pp	Other Asia
1424 Meerwijk	22.5%	5,040	+6.5 pp	Other Europe
1427 Amstelhoek	19.4%	955	+3.2 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	3,685	3,110	575	210	370	15	95	20	80	5	60	10	5	135	40	75	40	320	255
1999	3,890	3,265	620	220	395	10	95	25	90	5	65	10	0	145	40	90	40	345	275
2000	4,010	3,365	645	235	415	10	95	25	85	5	75	10	5	145	45	100	50	340	300
2001	4,250	3,565	685	265	420	10	90	25	95	5	80	10	5	170	40	105	50	390	295
2002	4,445	3,720	725	290	435	10	95	30	95	10	80	15	10	185	40	110	45	420	310
2003	4,700	3,905	790	300	485	10	100	40	110	10	85	15	10	190	45	120	50	445	350
2004	4,735	3,930	800	280	520	15	100	35	120	15	80	15	10	175	60	125	50	440	365
2005	4,785	3,960	825	310	520	15	100	40	115	20	75	35	15	185	55	125	50	465	365
2006	4,815	3,940	870	315	550	15	105	55	120	20	75	55	15	170	60	125	50	470	395
2007	4,865	3,970	895	330	565	10	105	55	120	20	75	65	15	175	60	135	60	485	415
2008	4,965	4,035	925	340	585	10	120	55	115	25	80	65	10	185	60	145	55	490	435
2009	5,055	4,095	965	340	620	15	125	60	115	15	80	65	10	185	85	150	55	490	475
2010	5,195	4,120	1,075	375	695	15	145	80	130	15	75	75	15	210	90	155	65	535	540
2011	5,255	4,115	1,145	420	725	20	145	100	130	15	90	100	15	215	95	155	65	585	560
2012	5,455	4,200	1,250	455	800	25	180	105	130	25	90	120	15	230	95	175	65	615	635
2013	5,720	4,370	1,350	475	865	30	185	125	140	25	90	130	20	235	95	200	65	640	710
2014	5,830	4,400	1,430	485	940	35	180	145	135	25	90	135	25	235	110	250	60	645	780
2015	5,870	4,370	1,500	520	980	45	175	155	135	25	95	165	25	235	115	260	70	690	810
2016	6,035	4,395	1,640	590	1,050	35	190	165	145	30	90	215	20	265	135	275	75	755	880
2017	6,035	4,365	1,670	615	1,060	30	200	155	140	35	90	225	20	280	140	285	75	770	905
2018	6,070	4,300	1,770	620	1,155	35	225	160	135	50	85	230	15	290	150	320	80	790	985
2019	6,115	4,245	1,870	615	1,250	40	230	170	135	55	75	225	20	295	155	385	80	785	1,085
2020	6,075	4,120	1,955	620	1,335	35	220	185	135	55	70	230	20	300	170	460	75	785	1,175
2021	5,960	3,965	1,995	605	1,390	40	215	175	130	55	75	230	15	285	180	520	75	760	1,240
2022	6,045	3,815	2,230	675	1,555	50	235	190	125	55	80	260	15	315	215	580	110	825	1,360
2023	6,145	3,795	2,350	705	1,645	60	245	205	115	55	80	250	15	360	210	640	115	845	1,465
2024	6,085	3,715	2,375	685	1,690	60	225	205	120	55	75	235	15	360	205	690	130	–	–
2025	6,080	3,655	2,425	710	1,720	60	210	200	120	50	75	210	20	405	215	730	130	–	–
2026	6,195	3,685	2,515	690	1,825	80	215	215	120	50	75	210	20	390	200	810	135	–	–

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