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Jefferson County Historical First Ancestry Data

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ACS 2010-2014 data

9,639 (84.07%) out of the total population of 11,465 reported first ancestry.

	Jefferson County	% of the Total Population	Montana	U.S.
Arab	0	0.00%, see rank	0.16%	0.56%
Czech	69	0.60%, see rank	0.81%	0.47%
Danish	84	0.73%, see rank	1.27%	0.42%
Dutch	382	3.33%, see rank	2.36%	1.40%
English	1,588	13.85%, see rank	11.52%	8.02%
French	618	5.39%, see rank	4.37%	3.34%
German	3,631	31.67%, see rank	26.76%	15.03%
Greek	71	0.62%, see rank	0.35%	0.41%
Hungarian	60	0.52%, see rank	0.31%	0.46%
Irish	1,929	16.83%, see rank	14.43%	10.80%
Italian	562	4.90%, see rank	3.41%	5.52%
Norwegian	1,125	9.81%, see rank	9.35%	1.42%
Polish	180	1.57%, see rank	2.05%	3.01%
Portuguese	95	0.83%, see rank	0.20%	0.44%
Russian	61	0.53%, see rank	1.07%	0.92%
Scotch-Irish	250	2.18%, see rank	1.52%	0.99%
Scottish	436	3.80%, see rank	3.05%	1.72%
Subsaharan African	39	0.34%, see rank	0.12%	0.95%
Swedish	497	4.33%, see rank	3.04%	1.27%
Swiss	41	0.36%, see rank	0.55%	0.30%
Ukrainian	0	0.00%, see rank	0.22%	0.31%
American	696	6.07%, see rank	7.48%	7.12%
Welsh	188	1.64%, see rank	0.97%	0.57%

ACS 2008-2012 data

10,139 (89.25%) out of the total population of 11,360 reported first ancestry.

	Jefferson County	% of the Total Population	Montana	U.S.
Arab	25	0.22%, see rank	0.20%	0.53%
Czech	47	0.41%, see rank	0.80%	0.50%
Danish	89	0.78%, see rank	1.29%	0.45%
Dutch	371	3.27%, see rank	2.55%	1.51%
English	1,921	16.91%, see rank	12.37%	8.53%
French	642	5.65%, see rank	4.68%	3.54%
German	3,711	32.67%, see rank	27.58%	15.79%
Greek	76	0.67%, see rank	0.31%	0.42%
Hungarian	46	0.40%, see rank	0.33%	0.48%
Irish	2,197	19.34%, see rank	15.42%	11.36%
Italian	638	5.62%, see rank	3.47%	5.66%
Norwegian	1,069	9.41%, see rank	9.43%	1.46%
Polish	202	1.78%, see rank	2.11%	3.13%
Portuguese	65	0.57%, see rank	0.22%	0.46%
Russian	34	0.30%, see rank	1.04%	0.97%
Scotch-Irish	278	2.45%, see rank	1.59%	1.07%
Scottish	456	4.01%, see rank	3.26%	1.81%
Subsaharan African	55	0.48%, see rank	0.13%	0.93%
Swedish	580	5.11%, see rank	3.27%	1.34%
Swiss	111	0.98%, see rank	0.63%	0.31%
Ukrainian	0	0.00%, see rank	0.23%	0.31%
American	535	4.71%, see rank	7.10%	6.72%
Welsh	189	1.66%, see rank	1.09%	0.60%

ACS 2006-2010 data

9,996 (89.52%) out of the total population of 11,166 reported first ancestry.

	Jefferson County	% of the Total Population	Montana	U.S.
Arab	38	0.34%, see rank	0.19%	0.50%
Czech	44	0.39%, see rank	0.89%	0.53%
Danish	119	1.07%, see rank	1.48%	0.48%
Dutch	236	2.11%, see rank	2.72%	1.63%
English	1,918	17.18%, see rank	13.01%	9.02%
French	707	6.33%, see rank	5.09%	3.77%
German	3,521	31.53%, see rank	29.18%	16.51%
Greek	104	0.93%, see rank	0.32%	0.44%
Hungarian	37	0.33%, see rank	0.35%	0.51%
Irish	2,134	19.11%, see rank	16.13%	11.76%
Italian	511	4.58%, see rank	3.61%	5.78%
Norwegian	1,206	10.80%, see rank	9.86%	1.51%
Polish	199	1.78%, see rank	2.11%	3.24%
Portuguese	5	0.04%, see rank	0.26%	0.47%
Russian	43	0.39%, see rank	1.02%	1.01%
Scotch-Irish	331	2.96%, see rank	2.61%	1.72%
Scottish	437	3.91%, see rank	3.33%	1.92%
Subsaharan African	6	0.05%, see rank	0.15%	0.91%
Swedish	537	4.81%, see rank	3.43%	1.41%
Swiss	131	1.17%, see rank	0.65%	0.33%
Ukrainian	3	0.03%, see rank	0.27%	0.31%
American	466	4.17%, see rank	6.09%	6.28%
Welsh	158	1.42%, see rank	1.05%	0.63%

ACS 2005-2009 data

10,038 (90.39%) out of the total population of 11,105 reported first ancestry.

	Jefferson County	% of the Total Population	Montana	U.S.
Arab	31	0.28%, see rank	0.18%	0.50%
Czech	32	0.29%, see rank	0.85%	0.54%
Danish	155	1.40%, see rank	1.54%	0.49%
Dutch	272	2.45%, see rank	2.70%	1.68%
English	1,988	17.90%, see rank	13.16%	9.29%
French	699	6.29%, see rank	5.24%	3.90%
German	3,787	34.10%, see rank	29.47%	16.89%
Greek	15	0.14%, see rank	0.28%	0.45%
Hungarian	48	0.43%, see rank	0.34%	0.52%
Irish	2,213	19.93%, see rank	16.07%	12.01%
Italian	605	5.45%, see rank	3.63%	5.91%
Norwegian	1,069	9.63%, see rank	10.09%	1.55%
Polish	293	2.64%, see rank	2.03%	3.32%
Portuguese	7	0.06%, see rank	0.26%	0.48%
Russian	59	0.53%, see rank	1.04%	1.04%
Scotch-Irish	302	2.72%, see rank	2.68%	1.77%
Scottish	527	4.75%, see rank	3.44%	1.97%
Subsaharan African	0	0.00%, see rank	0.17%	0.88%
Swedish	555	5.00%, see rank	3.51%	1.45%
Swiss	213	1.92%, see rank	0.66%	0.34%
Ukrainian	3	0.03%, see rank	0.26%	0.32%
American	332	2.99%, see rank	5.74%	6.43%
Welsh	138	1.24%, see rank	1.15%	0.65%

US Census 2000 data

7,653 (76.16%) out of the total population of 10,049 reported first ancestry.

	Jefferson County	% of the Total Population	Montana	U.S.
Arab	0	0.00%, see rank	0.09%	0.36%
Czech	36	0.36%, see rank	0.41%	0.27%
Danish	105	1.04%, see rank	1.05%	0.30%
Dutch	102	1.02%, see rank	1.38%	0.91%
English	1,003	9.98%, see rank	7.73%	5.91%
French	401	3.99%, see rank	3.07%	2.39%
German	1,765	17.56%, see rank	19.29%	10.81%
Greek	36	0.36%, see rank	0.18%	0.34%
Hungarian	29	0.29%, see rank	0.21%	0.32%
Irish	986	9.81%, see rank	8.92%	6.85%
Italian	352	3.50%, see rank	2.32%	4.59%
Norwegian	602	5.99%, see rank	8.00%	1.15%
Polish	148	1.47%, see rank	1.23%	2.24%
Portuguese	6	0.06%, see rank	0.11%	0.33%
Russian	44	0.44%, see rank	0.45%	0.68%
Scotch-Irish	165	1.64%, see rank	1.89%	1.17%
Scottish	193	1.92%, see rank	1.90%	1.12%
Subsaharan African	0	0.00%, see rank	0.03%	0.61%
Swedish	240	2.39%, see rank	1.94%	0.87%
Swiss	45	0.45%, see rank	0.35%	0.19%
Ukrainian	7	0.07%, see rank	0.14%	0.24%
American	409	4.07%, see rank	5.11%	7.33%
Welsh	62	0.62%, see rank	0.47%	0.31%

* ACS stands for U.S. Census American Community Survey. According to the U.S. Census, if the date is a range, you can interpret the data as an average of the period of time.