USA.com / Montana / Jefferson County / Population and Races / Historical Age Data

Jefferson County Historical Age Data

Basic InfoPopulation/RacesIncome/CareersHousingEducationOthers

ACS 2010-2014 data

Total population: 11,465

Median Age (see rank)

Jefferson County	47.60 years old
Montana	39.80 years old
U.S.	37.40 years old

Median Age, Male (see rank)

Jefferson County	47.60 years old
Montana	38.60 years old
U.S.	36.10 years old

Median Age, Female (see rank)

Jefferson County	47.60 years old
Montana	40.90 years old
U.S.	38.80 years old

	Jefferson County	% of the Total Population	Montana	U.S.
Under 5 years	505	4.40%, see rank	6.07%	6.36%
5 to 9 years	651	5.68%, see rank	6.39%	6.51%
10 to 14 years	861	7.51%, see rank	6.00%	6.59%
15 to 19 years	764	6.66%, see rank	6.51%	6.85%
20 to 24 years	425	3.71%, see rank	7.07%	7.13%
25 to 34 years	899	7.84%, see rank	12.49%	13.47%
35 to 44 years	1,241	10.82%, see rank	11.27%	12.96%
45 to 54 years	1,922	16.76%, see rank	13.90%	14.09%
55 to 64 years	2,296	20.03%, see rank	14.59%	12.29%
65 to 74 years	1,295	11.30%, see rank	8.89%	7.64%
75 to 84	463	4.04%, see rank	4.77%	4.25%
85 years and over	143	1.25%, see rank	2.05%	1.85%

US Census 2010 data

Total population: 11,406

Median Age (see rank)

Jefferson County	46.20 years old
Montana	39.80 years old
U.S.	37.20 years old

Median Age, Male (see rank)

Jefferson County	46.40 years old
Montana	38.80 years old
U.S.	35.80 years old

Median Age, Female (see rank)

Jefferson County	46.10 years old
Montana	41.00 years old
U.S.	38.50 years old

	Jefferson County	% of the Total Population	Montana	U.S.
Under 5 years	579	5.08%, see rank	6.31%	6.54%
5 to 9 years	686	6.01%, see rank	6.14%	6.59%
10 to 14 years	807	7.08%, see rank	6.18%	6.70%
15 to 19 years	795	6.97%, see rank	6.74%	7.14%
20 to 24 years	385	3.38%, see rank	6.79%	6.99%
25 to 34 years	887	7.78%, see rank	12.42%	13.30%
35 to 44 years	1,347	11.81%, see rank	11.42%	13.30%
45 to 54 years	2,151	18.86%, see rank	15.14%	14.58%
55 to 64 years	2,164	18.97%, see rank	14.03%	11.82%
65 to 74 years	1,054	9.24%, see rank	8.16%	7.03%
75 to 84	436	3.82%, see rank	4.65%	4.23%
85 years and over	115	1.01%, see rank	2.02%	1.78%

ACS 2008-2012 data

Total population: 11,360

Median Age (see rank)

Jefferson County	46.80 years old
Montana	39.90 years old
U.S.	37.20 years old

Median Age, Male (see rank)

Jefferson County	46.90 years old
Montana	38.80 years old
U.S.	35.80 years old

Median Age, Female (see rank)

Jefferson County	46.80 years old
Montana	41.00 years old
U.S.	38.50 years old

	Jefferson County	% of the Total Population	Montana	U.S.
Under 5 years	529	4.66%, see rank	6.14%	6.51%
5 to 9 years	647	5.70%, see rank	6.31%	6.57%
10 to 14 years	859	7.56%, see rank	6.12%	6.68%
15 to 19 years	793	6.98%, see rank	6.76%	7.09%
20 to 24 years	380	3.35%, see rank	6.91%	7.04%
25 to 34 years	841	7.40%, see rank	12.28%	13.32%
35 to 44 years	1,338	11.78%, see rank	11.53%	13.34%
45 to 54 years	2,158	19.00%, see rank	14.91%	14.44%
55 to 64 years	2,164	19.05%, see rank	14.10%	11.84%
65 to 74 years	1,108	9.75%, see rank	8.22%	7.12%
75 to 84	407	3.58%, see rank	4.74%	4.25%
85 years and over	136	1.20%, see rank	1.97%	1.78%

ACS 2006-2010 data

Total population: 11,166

Median Age (see rank)

Jefferson County	45.60 years old
Montana	39.70 years old
U.S.	36.90 years old

Median Age, Male (see rank)

Jefferson County	45.30 years old
Montana	38.60 years old
U.S.	35.60 years old

Median Age, Female (see rank)

Jefferson County	46.10 years old
Montana	40.90 years old
U.S.	38.10 years old

	Jefferson County	% of the Total Population	Montana	U.S.
Under 5 years	537	4.81%, see rank	6.13%	6.62%
5 to 9 years	688	6.16%, see rank	6.20%	6.62%
10 to 14 years	727	6.51%, see rank	6.33%	6.79%
15 to 19 years	803	7.19%, see rank	7.14%	7.28%
20 to 24 years	509	4.56%, see rank	7.02%	6.98%
25 to 34 years	737	6.60%, see rank	11.87%	13.22%
35 to 44 years	1,460	13.08%, see rank	12.02%	13.89%
45 to 54 years	2,250	20.15%, see rank	15.65%	14.57%
55 to 64 years	2,014	18.04%, see rank	13.27%	11.28%
65 to 74 years	938	8.40%, see rank	7.69%	6.74%
75 to 84	407	3.64%, see rank	4.86%	4.30%
85 years and over	96	0.86%, see rank	1.82%	1.70%

ACS 2005-2009 data

Total population: 11,105

Median Age (see rank)

Jefferson County	44.10 years old
Montana	39.00 years old
U.S.	36.50 years old

Median Age, Male (see rank)

Jefferson County	43.90 years old
Montana	37.70 years old
U.S.	35.20 years old

Median Age, Female (see rank)

Jefferson County	44.30 years old
Montana	40.20 years old
U.S.	37.90 years old

	Jefferson County	% of the Total Population	Montana	U.S.
Under 5 years	547	4.93%, see rank	6.21%	6.92%
5 to 9 years	712	6.41%, see rank	6.08%	6.59%
10 to 14 years	817	7.36%, see rank	6.35%	6.83%
15 to 19 years	927	8.35%, see rank	7.34%	7.15%
20 to 24 years	506	4.56%, see rank	7.81%	7.02%
25 to 34 years	634	5.71%, see rank	11.76%	13.42%
35 to 44 years	1,537	13.84%, see rank	12.26%	14.18%
45 to 54 years	2,263	20.38%, see rank	15.63%	14.48%
55 to 64 years	1,853	16.69%, see rank	12.47%	10.81%
65 to 74 years	818	7.37%, see rank	7.28%	6.50%
75 to 84	319	2.87%, see rank	4.90%	4.40%
85 years and over	172	1.55%, see rank	1.91%	1.71%

US Census 2000 data

Total population: 10,049

Median Age (see rank)

Jefferson County	40.20 years old
Montana	37.50 years old
U.S.	35.30 years old

Median Age, Male (see rank)

Jefferson County	40.30 years old
Montana	36.60 years old
U.S.	34.00 years old

Median Age, Female (see rank)

Jefferson County	40.10 years old
Montana	38.50 years old
U.S.	36.50 years old

	Jefferson County	% of the Total Population	Montana	U.S.
Under 5 years	524	5.21%, see rank	6.08%	6.81%
5 to 9 years	736	7.32%, see rank	6.87%	7.30%
10 to 14 years	968	9.63%, see rank	7.68%	7.29%
15 to 19 years	822	8.18%, see rank	7.90%	7.18%
20 to 24 years	267	2.66%, see rank	6.47%	6.74%
25 to 34 years	843	8.39%, see rank	11.45%	14.18%
35 to 44 years	1,851	18.42%, see rank	15.73%	16.04%
45 to 54 years	1,903	18.94%, see rank	14.97%	13.39%
55 to 64 years	1,100	10.95%, see rank	9.43%	8.63%
65 to 74 years	616	6.13%, see rank	6.93%	6.54%
75 to 84	308	3.06%, see rank	4.78%	4.39%
85 years and over	111	1.10%, see rank	1.70%	1.51%

* 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.