Granite County, Montana

County in MT, US

By Neilsberg Research

Last updated May 1, 2026

Key Indicators

A quick look at key numbers

Population

3,462

Source: U.S. Census Bureau American Community Survey (ACS) 2020-2024 5-Year Estimates

Median Age

years ∙ half population younger than 53, half older

Diversity Index

18.7%

chance two random people differ in race and ethnicity

Nativity

2.2%

foreign-born population

97.8%Native

2.2% Foreign-born

Geographic Context

Location, size, and surroundings

About

Granite County is a county in Montana, United States.

Location

County in MT, US

Co-ordinates

DEC46.395955° N, 113.427356° W

DMS46° 23′ 45.44″ N, 113° 25′ 38.48″ W

Population Density & area

2/sq mi (0.774/km²)

Total Area

1,733 sq mi (4,488 km²)

Land Area

1,727 sq mi (4,473 km²) · 99.68%

Water Area

6 sq mi (15 km²) · 0.32%

Demographics & Living

Who lives here, how households are formed, and community composition

Population Composition

Key characteristics of the population

Sex Distribution

50.7% male

Male 50.7%

Female 49.3%

males per 100 females

Granite County 102.8

Montana 102.7

United States 98

Nativity

2.2%

foreign-born population

97.8%Native

2.2% Foreign-born

% Foreign-born

Granite County 2.2%

Montana 2.3%

United States 14.1%

Age Distribution

How the population is spread across age groups

Median Age

years ∙ half population younger than 53, half older

Granite County

Montana

40.4

United States

38.9

Dependency ratio

dependents per 100 working-age adults

Granite County 85

Montana 69.9

United States 64.4

AGE DISTRIBUTION

Distribution of age group

Median age

	Granite County	Montana	United States
Age Group
Children (Under 18)	14.7%	21%	22%
Working age (18-64)	54%	58.9%	60.8%
Senior (65+)	31.3%	20.1%	17.2%
Dependency ratio
Total dependency ratio	85	69.9	64.4
Child dependency ratio	27.2	35.7	36.1
Old-age dependency ratio	57.8	34.2	28.3

Racial & Ethnic Composition

Racial and ethnic makeup and how it compares

Race & Ethnicity

White

90%

Black

0.1%

Asian

0.9%

Hispanic

2.6%

Other

6.4%

Note: White, Black, and Asian refer to individuals belonging to a single race and not of Hispanic origin. Hispanics may be of any race.

Diversity Index

18.7%

chance two random people differ in race and ethnicity

Granite County 18.7%

Montana 29.4%

United States 61.4%

Note: The Diversity Index (DI), based on the Blau Index, measures the probability that two randomly selected individuals differ in race and ethnicity. Values range from 0 (no diversity) to 1 (high diversity) and are shown as percentages.

RACIAL & ETHNIC COMPOSITION

Race & Ethnicity

Percentage of Granite County population

	Granite County	Montana	United States
Hispanic or Latino	2.6%	4.6%	19.3%
Mexican	0.3%	2.9%	11.3%
Puerto Rican	0.2%	0.2%	1.8%
Cuban	0%	0.1%	0.8%
Other Hispanic / Latino	2.1%	1.3%	5.5%
Not Hispanic or Latino	97.4%	95.4%	80.7%
One race	93.4%	90.7%	76.4%
White	90%	83.6%	57.4%
Black or African American	0.1%	0.4%	11.9%
American Indian and Alaska Native	1.8%	5.3%	0.5%
Asian	0.9%	0.8%	5.9%
Native Hawaiian and Other Pacific Islander	0.1%	0%	0.2%
Some Other Race	0.5%	0.5%	0.6%
Two or more races (Multiracial)	4%	4.7%	4.3%

Household & Families Composition

Household size, type, and family structure

Household structure

64.3% family

Family 64.3%

Non family 35.7%

% family households

Granite County 64.3%

Montana 60.3%

United States 64.2%

Average household size

2.21

persons per household

Granite County

2.21

Montana

2.37

United States

2.53

Household & Family COMPOSITION

Households

Percentage of Granite County population

	Granite County	Montana	United States
Total households	1,514	458,859	129,227,496
Average houshold size	2.21	2.37	2.53
Family households	974	276,731	82,990,528
Average family size	2.7	3	3.14
Married couple family	875	222,207	60,637,388
Other families	99	54,524	22,353,140
Male householder	49	19,995	6,572,819
Female householder	50	34,529	15,780,321
Non-family households	540	182,128	46,236,968
One-person households	505	144,042	37,140,836
Male householder	315	71,216	16,871,444
Senior (65+) living alone	112	24,799	5,225,110
Female householder	190	72,826	20,269,392
Senior (65+) living alone	114	38,387	10,089,070
Other living arrangements	35	38,086	9,096,132

Housing Profile

Housing stock, ownership, rentals, and cost burdens

Total housing units

2,602

housing units

Granite County 2,602

Montana 528,419

United States 143,775,355

Occupancy status

58.2% occupied

Occupied 58.2%

Vacant 41.8%

vacancy rate

Granite County 41.8%

Montana 13.2%

United States 10.1%

Housing Characteristics

How the housing supply is structured and used

Types of Housing unit

85%

Single family houses

85%

Apartments in multi-unit structures

4.5%

Mobile homes

10.3%

Boat, RV, van, etc

0.3%

Median Year Built

1979

Half of houses were built before 1979, and half after.

Historic ∙ 1939 or earlier

20.4%

Postwar & mid-century ∙ 1940 - 1969

17.4%

Late 20th century ∙ 1970 - 1999

28.3%

Modern ∙ 2000 or later

33.9%

Note: Median year built reflects occupied units only; distribution includes all units.

Housing Characteristics

Units, rooms & bedrooms

Physical characteristics of housing units

	Granite County	Montana	United States
Rooms per unit
Median rooms	5.1	5.6	5.5
1–3 rooms	26.1%	14.6%	15.1%
4–6 rooms	45.1%	49.7%	51.6%
7+ rooms	28.8%	35.9%	33.4%
Bedrooms
No bedroom / studio	6.6%	2.7%	2.9%
1 bedroom	18.3%	10.3%	10.9%
2 bedrooms	28.3%	25.7%	25%
3 bedrooms	29.7%	36.5%	38.7%
4+ bedrooms	17.1%	24.8%	22.4%
At a glance
Median year built	1979	1981	1981
Total housing units	2,602	528,419	143,775,355

Occupancy Profile

Who is inside and how they use it

Homeownership

77.9% owners

Renter-occupied 22.1%

Owner-occupied 77.9%

homeownership rate

Granite County 77.9%

Montana 69.2%

United States 65.2%

Average household size

2.41

Owner-occupied

1.51

Renter-occupied

owner-occupied average size

Granite County 2.41

Montana 2.49

United States 2.64

Housing Characteristics

Occupied unit characteristics

Tenure, crowding, and utilities

	Granite County	Montana	United States
Total occupied units	1,514	458,859	129,227,496
Year moved in
2020 or later	18.5%	25.5%	24.8%
2010 to 2019	38.4%	39.7%	39.6%
2000 to 2009	18.8%	15.9%	16.4%
1999 or earlier	24.4%	18.9%	19.1%
Occupants per room
1.00 or fewer	98.5%	98.2%	96.6%
1.01 to 1.50	1.2%	1.2%	2.2%
1.51 or more	0.3%	0.7%	1.2%
Vehicles availability
No vehicles	3.5%	4.7%	8.4%
1 vehicle	20.7%	26.9%	33.1%
2 vehicles	28.7%	36.9%	36.6%
3 or more vehicles	47.1%	31.5%	21.9%
House heating fuel used
Gas	52.4%	63.5%	51.4%
Electricity	18.8%	27.3%	41.3%
Solar	0.3%	0.2%	0.3%
Fuel oil, kerosene etc	1%	0.6%	3.9%
All other fuels	26.8%	7.9%	2%
No fuel used	0.8%	0.5%	1.2%
Selected characteristics
Lacking complete plumbing	2.4%	0.5%	0.4%
Lacking complete kitchen	1.9%	0.9%	0.8%
No telephone service available	1.1%	1.1%	0.9%

Housing Value

What owner-occupied units are worth

Median home value

$352,700

owner-occupied units

Median value(USD)

Granite County

$352,700

Montana

$375,800

United States

$332,700

Housing Cost Burden

30.6%

of homeowners with a mortgage are cost-burdened

% Cost-Burdened Households

Owners with a mortgage

30.6%

Owners without a mortgage

13.5%

Renters

46.6%

Note: Households spending 30% or more of their income on housing costs are considered cost-burdened.

Financial characteristics

Property value and housing costs

Tenure, crowding, and utilities

	Granite County	Montana	United States
Property value
Median Value	$352,700	$375,800	$332,700
Under $100,000	9.4%	10.2%	11.4%
$100,000 - $200,000	11%	11.2%	15.8%
$200,000 - $300,000	18.2%	15.9%	17.8%
$300,000 - $500,000	31.5%	30.8%	26.9%
$500,000 - $1,000,000	18.7%	24.9%	20.9%
$1,000,000 and more	11.3%	7%	7.1%
Owner-occupied households
With a mortgage	34.2%	54.5%	60.6%
Without a mortgage	65.8%	45.5%	39.4%
Median monthly owner costs
With a mortgage	$1,708	$1,798	$1,963
Without a mortgage	$470	$571	$638
Gross rent
Median rent	$675	$1,081	$1,413

Education Profile

How educated is the community and how education pays off

Adults with a college degree

34.2%

of adults 25+ with a bachelor's degree or higher

Granite County 34.2%

Montana 35.2%

United States 35.7%

Adults without a high school diploma

6.4%

of adults (25+) without a high school diploma

Granite County 6.4%

Montana 5.4%

United States 10.4%

School Enrollment

Who is enrolled in school and at what level

School enrollment

574

population (age 3+) enrolled in school

Nursery / Preschool

7.7%

K–12

67.6%

College / Undergraduate

18.3%

Graduate / Professional

6.4%

College-going rate (18-24 yr olds)

30.4%

of 18-24-year-olds in college or graduate school

Granite County

30.4%

Montana

34.5%

United States

40.9%

Enrollment & school type

Enrollment levels, college-going rate, and public vs private school split

Population 3+ currently enrolled in a school

	Granite County	Montana	United States
Total enrolled (age 3+)	574	240,826	80,089,790
Nursery / preschool	7.7%	5.2%	5.7%
K–12	67.6%	70.6%	67.6%
Kindergarten	4.4%	5.3%	5%
Elementary: Grades 1–4	13.6%	21.7%	19.8%
Elementary: Grades 5–8	20%	22%	21%
High School: Grades 9–12	29.6%	21.7%	21.7%
College or graduate school	24.7%	24.2%	26.7%
College, undergraduate	18.3%	19.1%	21%
Graduate, professional school	6.4%	5%	5.8%
College-going rate · 18-24 yr olds	30.4%	34.5%	40.9%
School type
Public school	77.7%	84%	82%
Private school	22.3%	16%	18%

Education Attainment by Level & Gender

What is the highest level of education completed among adults

Education attainment

2,700

population 25 years and over

Total adults (25+)

Less than 9th grade

0.9%

9th-12th, no diploma

5.5%

HS graduate

29.9%

Some college no degree

19.7%

Associates degree

9.9%

Bachelors degree

28.5%

Graduate or professional degree

5.7%

Attainment by gender

Male vs Female

Adults (25+) · Share within each education level

% male · % female

Less than 9th grade

43.5% · 56.5%

9th-12th, no diploma

51% · 49%

HS graduate

57.9% · 42.1%

Some college no degree

61.8% · 38.2%

Associates degree

36.1% · 63.9%

Bachelors degree

44.9% · 55.1%

Graduate or professional degree

60% · 40%

Educational Attainment Overview

Distribution and key education attainment rates for adults (25+)

Highest credential completed · adults 25+

	Granite County	Montana	United States
Population (25+)	2,700	781,264	230,807,303
Less than 9th grade	0.9%	1.6%	4.7%
9th–12th, no diploma	5.5%	3.8%	5.7%
High school diploma or GED	29.9%	27.5%	26%
Some college, no degree	19.7%	22.4%	19.1%
Associate's degree	9.9%	9.6%	8.8%
Bachelor's degree or higher	34.2%	35.2%	35.7%
Bachelor's degree	28.5%	23.2%	21.6%
Graduate or professional	5.7%	12%	14.1%
High School or higher	93.6%	94.6%	89.6%

Earnings by education level

percentage as applicable

Median Earnings

$40,000

Median earnings for adults 25+, by level

Less than HS graduate

$—

HS graduate

$36,139

Some college or associates

$34,688

Bachelors degree

$48,421

Graduate or professional degree

$—

Poverty Rate

for ages 25+, with bachelors degree or higher

Less than HS graduate

36.2%

HS graduate

8.5%

Some college or associates

14.9%

Bachelors degree or higher

Outcomes by Education Level

Earnings and poverty rates across education levels (25+)

Adults 25+

	Granite County	Montana	United States
Median earnings
Population 25+, with earnings	$40,000	$46,951	$52,696
Less than high school graduate	$—	$33,639	$32,485
High school graduate (includes equivalency)	$36,139	$38,073	$40,153
Some college or associate's degree	$34,688	$42,611	$47,260
Bachelor's degree	$48,421	$55,623	$70,044
Graduate or professional degree	$—	$72,265	$90,720
Poverty rates
Less than high school graduate	36.2%	26.8%	24.2%
High school graduate (includes equivalency)	8.5%	13.1%	14.4%
Some college or associate's degree	14.9%	9.9%	9.8%
Bachelor's degree or higher	5%	4.7%	4.5%

Insights for Granite County, by topic

Income By year By race By age By gender

Population By year By race By age By gender

About Neilsberg Research

Neilsberg Research team are data scientists with expertise in processing, analysis and visualization of big data helping small businesses make right decisions.

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