Jefferson County, Montana's estimated 2024 population is 13,265 with a growth rate of 1.66% in the past year according to the most recent United States census data. Jefferson County, Montana is the 15th largest county in Montana. The 2010 population was 11,406 and has seen a growth of 16.3% since that time.
Year | Population | Growth | Change |
|---|---|---|---|
| 2029 | 14,350 | 217 | 1.54% |
| 2028 | 14,133 | 217 | 1.56% |
| 2027 | 13,916 | 217 | 1.58% |
| 2026 | 13,699 | 217 | 1.61% |
| 2025 | 13,482 | 217 | 1.64% |
| 2024 | 13,265 | 217 | 1.66% |
| 2023 | 13,048 | 217 | 1.69% |
| 2022 | 12,831 | 363 | 2.91% |
| 2021 | 12,468 | 326 | 2.68% |
| 2020 | 12,142 | -69 | -0.57% |
| 2019 | 12,211 | 127 | 1.05% |
| 2018 | 12,084 | 166 | 1.39% |
| 2017 | 11,918 | 144 | 1.22% |
| 2016 | 11,774 | 198 | 1.71% |
| 2015 | 11,576 | 71 | 0.62% |
| 2014 | 11,505 | 48 | 0.42% |
| 2013 | 11,457 | 138 | 1.22% |
| 2012 | 11,319 | -54 | -0.47% |
| 2011 | 11,373 | -33 | -0.29% |
| 2010 | 11,406 | 0 | 0% |
| 1990 | 7,939 | 910 | 12.95% |
| 1980 | 7,029 | 1,791 | 34.19% |
| 1970 | 5,238 | 941 | 21.9% |
| 1960 | 4,297 | 283 | 7.05% |
| 1950 | 4,014 | -650 | -13.94% |
| 1940 | 4,664 | 531 | 12.85% |
| 1930 | 4,133 | -1,070 | -20.57% |
| 1920 | 5,203 | -398 | -7.11% |
| 1910 | 5,601 | 271 | 5.08% |
| 1900 | 5,330 | -696 | -11.55% |
| 1890 | 6,026 | 3,562 | 144.56% |
| 1880 | 2,464 | 933 | 60.94% |
| 1870 | 1,531 | -12,819 | -89.33% |
Race | Population | Percentage (of total) |
|---|---|---|
| White | 11,437 | 93.19% |
| Two or more races | 535 | 4.36% |
| Native American | 140 | 1.14% |
| Other race | 75 | 0.61% |
| Asian | 49 | 0.4% |
| Black or African American | 37 | 0.3% |
| Native Hawaiian or Pacific Islander | 0 | 0% |
White
Two or more races
Native American
Other race
Asian
Black or African American
Native Hawaiian or Pacific Islander
Household Type | Count | Average Size | Owner | Renter |
|---|---|---|---|---|
| All | 4,681 | 2.56 | 83.1 | 16.9 |
| Married | 3,136 | 2.94 | 89.8 | 10.2 |
| Non Family | 1,161 | 1.23 | 70.9 | 29.1 |
| Female | 225 | 3.88 | 59.1 | 40.9 |
| Male | 159 | 2.78 | 73.6 | 26.4 |
2.95
Average Family Size
2.56
Average Household Size
83.1%
Rate of Home Ownership
Married
Male
Female
NonFamily
owner
renter
Male
Female
Education Attained | Count | Percentage |
|---|---|---|
| 9th to 12th Grade | 307 | 3.42% |
| Associates Degree | 1,055 | 11.74% |
| Bachelors Degree | 1,925 | 21.42% |
| Graduate Degree | 1,065 | 11.85% |
| High School Graduate | 2,414 | 26.86% |
| Less Than 9th Grade | 260 | 2.89% |
| Some College | 1,962 | 21.83% |
Less Than 9th Grade
9th to 12th Grade
High School Graduate
Some College
Associates Degree
Bachelors Degree
Graduate Degree
High School Graduation Rate
Bachelors Rate
Race | Total | High School | Bachelors |
|---|---|---|---|
| White | 8,321 | 7,872 | 2,864 |
| 2+ Races | 315 | 309 | 66 |
| Hispanic | 181 | 114 | 25 |
| Native American | 102 | 75 | 0 |
| Asian | 49 | 31 | 20 |
| Other Race | 38 | 28 | 2 |
| Black | 28 | 28 | 19 |
The highest rate of high school graduation is among black people with a rate of 100%.
The highest rate of bachelors degrees is among black people with a rate of 67.86%.
All
Male
Female
Name | Average | Male | Female |
|---|---|---|---|
| Bachelors Degree | $53,229 | $60,667 | $51,284 |
| Graduate Degree | $66,750 | $93,056 | $62,250 |
| High School Graduate | $37,266 | $41,764 | $19,226 |
| Less Than 9th Grade | $38,056 | $56,000 | $0 |
| Overall | $42,860 | $56,090 | $32,679 |
| Some College | $39,203 | $57,891 | $26,341 |
$42,860
Average Earnings
$56,090
Average Male
$32,679
Average Female
Only English
Spanish
Other Indo-European Languages
Asian and Pacific Island Languages
Other Languages
96.95% of Jefferson County, Montana residents speak only English, while 3.05% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 1.84% of the population.
rate
Name | Total | In Poverty | Poverty Rate |
|---|---|---|---|
| White | 11,051 | 589 | 5.33% |
| Hispanic | 344 | 9 | 2.62% |
| Multiple | 533 | 6 | 1.13% |
| Black | 37 | 5 | 13.51% |
5.06%
Overall Poverty Rate
4.53%
Male Poverty Rate
5.61%
Female Poverty Rate
The race most likely to be in poverty in Jefferson County, Montana is Black, with 13.51% below the poverty level.
The race least likely to be in poverty in Jefferson County, Montana is Multiple, with 1.13% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 1.01%. Among those working part-time, it was 6.5%, and for those that did not work, the poverty rate was 8.52%.
rate
Rate | Poverty |
|---|---|
| Less Than 9th Grade | 14.15% |
| High School | 7.45% |
| Some College | 4.56% |
| Bachelors or Greater | 3.72% |
rate
Rate | Poverty |
|---|---|
| Male Employed | 3.75% |
| Female Employed | 3.11% |
| Male Unemployed | 0.85% |
| Female Unemployed | 0% |
Households
Families
MarriedFamilies
NonFamilies
Name | Median | Mean |
|---|---|---|
| Families | $89,914 | $115,348 |
| Households | $73,875 | $101,042 |
| Married Families | $101,071 | $-999,999,999 |
| Non Families | $42,266 | $54,255 |
mean
median
Married
Widowed
Divorced
Separated
NeverMarried
63.4%
Overall Marriage Rate
62.1%
Male Marriage Rate
64.6%
Female Marriage Rate
male
female
The age group where males are most likely to be married is 35-44, while the female age group most likely to be married is 45-54.
Married
Widowed
Divorced
Separated
NeverMarried
Second Gulf War
First Gulf War
Vietnam
Korea
World War II
1,171
Number of Veterans
1,083
Male Veterans
88
Female Veterans
War | Veterans |
|---|---|
| Vietnam | 493 |
| First Gulf War | 399 |
| Second Gulf War | 201 |
| Korea | 19 |
| World War II | 0 |
count
Age Group | Veterans |
|---|---|
| 35 to 54 | 368 |
| 65 to 74 | 344 |
| 55 to 64 | 260 |
| 75+ | 189 |
| 18 to 34 | 10 |
count
Name | Veterans | % of Total |
|---|---|---|
| White | 1,119 | 12.18% |
| 2+ Races | 27 | 7.07% |
| Hispanic | 24 | 9.76% |
| Native American | 14 | 11.57% |
| Other Race | 11 | 28.95% |
Less Than 9th Grade
High School Graduate
Some College
Bachelors or Greater
1.9%
Veteran Poverty Rate
37.42%
Veteran Disability Rate
LaborForceParticipation
57.5%
Labor Force Participation
55.5%
Employment Rate
3.4%
Unemployment Rate
LaborForceParticipation
LaborForceParticipation
Europe
Asia
Africa
Oceania
Latin America
North America
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Europe
Asia
Africa
Oceania
Latin America
North America
50.46%
Born in Jefferson County, Montana
97.82%
Native Born
2.18%
Foreign Born
0.91%
Non Citizen
1.27%
Naturalized
97.82% of Jefferson County, Montana residents were born in the United States, with 50.46% having been born in Montana. 0.91% of residents are not US citizens. Of those not born in the United States, the largest percentage are from North America.