Jefferson County, Montana

10 cities & places have their primary county here.

Population: 12,501
Median household income: $76,576
Median home value: $408,000

Jefferson County, Montana counts 12,501 residents. 10 cities and places have their primary county here. At $76,576, its median household income sits above Montana's $69,922.

Between 2019 and 2023, Jefferson County's population grew 4.9% from 11,917 to 12,501, while its median household income rose 10.0% from $69,646 to $76,576.

The median resident is 47.3 years old. The largest age group is 55 to 64, 16.6% of residents.

Demographics

ACS 2019–2023

Population: 12,501
Median age: 47.3 yrs
Median household income: $76,576
Median home value: $408,000
Median gross rent: $886
Housing units: 5,388
Homeownership rate: 83.1%
Bachelor's degree or higher: 32.7%
Unemployment rate: 2.8%

Trends

ACS 5-year · 2019–2023

Population

11,91712,501

Median household income

$69,646$76,576

Median home value

$282,700$408,000

Median gross rent

$788$886

Year	Population	Median household income	Median home value	Median gross rent
2019	11,917	$69,646	$282,700	$788
2020	12,069	$71,779	$290,700	$834
2021	12,057	$72,500	$304,300	$798
2022	12,273	$73,875	$354,700	$869
2023	12,501	$76,576	$408,000	$886

Each year is a US Census Bureau ACS 5-year estimate ending that year.

Age distribution

Under 54.4%

5 to 1715.8%

18 to 246.3%

25 to 349.0%

35 to 4411.9%

45 to 5413.1%

55 to 6416.6%

65 to 7415.8%

75 and over7.0%

	Count	Share
Under 5	551	4.4%
5 to 17	1,975	15.8%
18 to 24	791	6.3%
25 to 34	1,127	9.0%
35 to 44	1,490	11.9%
45 to 54	1,638	13.1%
55 to 64	2,081	16.6%
65 to 74	1,970	15.8%
75 and over	878	7.0%

Race & ethnicity

	Count	Share
White (non-Hispanic)	11,414	91.3%
Black or African American	14	0.1%
American Indian & Alaska Native	151	1.2%
Asian	51	0.4%
Native Hawaiian & Pacific Islander	0	0.0%
Some other race	12	0.1%
Two or more races	520	4.2%
Hispanic or Latino (any race)	339	2.7%

Educational attainment (age 25+)

No high school diploma6.0%

High school graduate26.2%

Some college or associate's35.1%

Bachelor's degree21.2%

Graduate or professional degree11.5%

	Count	Share
No high school diploma	553	6.0%
High school graduate	2,407	26.2%
Some college or associate's	3,223	35.1%
Bachelor's degree	1,946	21.2%
Graduate or professional degree	1,055	11.5%

Commute to work

Mean travel time to work: 22 min

Drove alone72.2%

Carpooled11.7%

Public transit0.2%

Walked3.0%

Bicycle0.1%

Worked from home11.9%

Other means1.0%

How workers get to work

	Count	Share
Drove alone	4,080	72.2%
Carpooled	659	11.7%
Public transit	10	0.2%
Walked	169	3.0%
Bicycle	6	0.1%
Worked from home	670	11.9%
Other means	56	1.0%

Travel time

	Count	Share
Under 15 min	1,561	31.3%
15 to 29 min	1,984	39.8%
30 to 44 min	746	15.0%
45 to 59 min	402	8.1%
60+ min	287	5.8%

Households

Average household size: 2.50
Poverty rate: 6.3% (771 of 12,259)

	Count	Share
Family households	3,617	74.0%
Nonfamily households	1,273	26.0%

Housing

Median year structure built: 1989

Occupancy

	Count	Share
Occupied	4,890	90.8%
Vacant	498	9.2%

Tenure (of occupied units)

	Count	Share
Owner-occupied	4,065	83.1%
Renter-occupied	825	16.9%

1-unit, detached83.7%

1-unit, attached2.3%

2 to 4 units2.3%

5 to 19 units1.2%

20 or more units0.3%

Mobile home & other10.2%

Units in structure

	Count	Share
1-unit, detached	4,508	83.7%
1-unit, attached	125	2.3%
2 to 4 units	122	2.3%
5 to 19 units	66	1.2%
20 or more units	16	0.3%
Mobile home & other	551	10.2%

Geography

County GEOID: 30043
State: Montana
Land area: 1,657 sq mi
Water area: 2.42 sq mi
Center point: 46.1242, -112.0594