Williamson County, TX Population By Ancestry in 2021 (ACS-5Yrs)

Updated on April 15, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, among the 591.76K Williamson County, TX population, 228.82K had Other Groups ancestry (38.67%), 121.84K had Unclassified ancestry (20.59%), and 88.21K had German ancestry (14.91%).

The chart below shows the top 10 ancestry groups by percentage, and the table below shows both the population and percentages for many ancestry groups.

You can see similar information for other Texas counties, and for Texas.

NB: People could belong to one or more ancestry groups.

Data Source: US Census Bureau.

Williamson County, TX Percentage of Ancestry Population in 2021

Other Groups

Unclassified

German

English

Irish

American

Italian

French (except Basque)

European

Scottish

Williamson County, TX Population By Ancestry in 2021

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Ancestry	Population	Percent of Pop. (%)
Other Groups	228818	38.67
Unclassified	121836	20.59
German	88214	14.91
English	62229	10.52
Irish	50391	8.52
American	27514	4.65
Italian	18021	3.05
French (except Basque)	15135	2.56
European	12998	2.20
Scottish	12600	2.13
Polish	10396	1.76
Czech	9238	1.56
Scotch Irish	8090	1.37
Swedish	6530	1.10
Norwegian	6045	1.02
Subsaharan African	6003	1.01
Dutch	5276	0.89
Welsh	4430	0.75
British	4389	0.74
Russian	3071	0.52
African	2808	0.48
Danish	2701	0.46
Scandinavian	2389	0.40
French Canadian	2072	0.35
Eastern European	1614	0.27
Swiss	1587	0.27
Greek	1530	0.26
Nigerian	1406	0.24
West Indian (except Hispanic groups)	1397	0.24
Portuguese	1361	0.23
Hungarian	1266	0.21
Turkish	1249	0.21
Canadian	1242	0.21
Iranian	973	0.16
Northern European	940	0.16
Ukrainian	901	0.15
Arab	889	0.15
Brazilian	837	0.14
Czechoslovakian	763	0.13
Lebanese	757	0.13
Lithuanian	744	0.13
Austrian	707	0.12
Ethiopian	663	0.11
Belgian	603	0.10
Syrian	595	0.10
Romanian	562	0.10
Finnish	558	0.09
Palestinian	464	0.08
Jamaican	426	0.07
Slovene	424	0.07
Australian	408	0.07
Slovak	363	0.06
Cajun	345	0.06
Yugoslavian	334	0.06
Croatian	329	0.06
Jordanian	307	0.05
Ghanaian	292	0.05
Bahamian	261	0.04
Israeli	254	0.04
Celtic	232	0.04
Haitian	195	0.03
Serbian	190	0.03
Egyptian	185	0.03
Latvian	166	0.03
Albania	158	0.03
Armenian	154	0.03
Iraqi	128	0.02
Dutch West Indian	127	0.02
Slavic	126	0.02
West Indian	121	0.02
Kenyan	113	0.02
Guyanese	106	0.02
Pennsylvania German	104	0.02
Maltese	96	0.02
Barbadian	91	0.02
South African	87	0.02
Belizean	77	0.01
Trinidadian and Tobagonian	63	0.01
Afghan	57	0.01
Senegalese	55	0.01
Moroccan	47	0.01
British West Indian	36	0.01
Basque	35	0.01
German Russian	34	0.01
Luxembourger	34	0.01
Bulgarian	17	0.003
Carpatho Rusyn	17	0.003
Icelander	16	0.003
Alsatian	11	0.002
Estonian	10	0.002