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COUNTY

Lewis and Clark County

Montana · 75,331 residents (2025 est.) · 3,458.381 sq mi
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The short version

Lewis and Clark County has roughly average household income, with a median household income of $78,237. Population has grown 32% since 2000. Median home value has more than tripled since 2000, reaching $393,500. It sits in the top 10% of US counties for household income.

At a glance
Average income
near the US median
US median: $82,259
Older
median age 41.8
US median: 38.9
More educated
43% hold a bachelor's degree
US average: 36%
Less affordable
home values up 104%, inflation adjusted
US median home: $376,019
Section 01

Population & growth

Total population
73,464
+32%since 2000
from 55,716 in 2000
1990 – 2025
Population density
21 / sq mi
+22%since 2009
from 17 / sq mi in 2009
US average: 281
Median age
41.8
+10%since 2000
from 38.0 in 2000
US average: 38.9

PEP 2025 EST:75,331 residents (Census Bureau Vintage 2025, released March 2026)

Population, 1990 – 2024
45K53K60K68K76K1990201020202024Lewis and Clark County
202473K
1990201020202024
Age distribution, 2024
Under 55.2%(3,804)
US avg: 5.6%
5 to 95.9%(4,349)
US avg: 6%
10 to 146.2%(4,573)
US avg: 6.4%
15 to 196.1%(4,488)
US avg: 6.6%
20 to 245.2%(3,843)
US avg: 6.5%
25 to 3412%(8,827)
US avg: 13.7%
35 to 4413.5%(9,944)
US avg: 13.2%
45 to 5411.6%(8,530)
US avg: 12.2%
55 to 6414%(10,263)
US avg: 12.7%
65 to 7412.8%(9,384)
US avg: 10.2%
75 to 845.9%(4,325)
US avg: 5.1%
85 and over1.5%(1,134)
US avg: 1.9%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02

Income & economy

Median household income
$78,237
+15%inflation adjusted, since 2000
from $37,360 in 2000
US average: $82,259
1990 – 2024
Per capita income
$44,837
+139%since 2000
from $18,763 in 2000
US average: $44,673
Households earning $100K+
52.3%
+24.3 ptssince 2009
from 28.0% in 2009
US average: 53.3%
Poverty rate
8.1%
−2.9 ptssince 2000
from 10.9% in 2000
US average: 12.5%
Income inequality (Gini)
0.430
+7%since 2010
from 0.400 in 2010
US average: 0.476
Workforce by industry, 2024
Information9.7%
US avg: 10.8%
Wholesale trade8%
US avg: 6.9%
Other services6.2%
US avg: 6.7%
Public administration4.7%
US avg: 4.8%
Agriculture, forestry, fishing2.9%
US avg: 1.6%
Retail trade2.8%
US avg: 9.9%
Finance & insurance2.4%
US avg: 5.9%
Construction2.3%
US avg: 1.2%
Professional, scientific, technical2.2%
US avg: 5.1%
Transportation & warehousing1.6%
US avg: 2.2%
Arts, entertainment, food1.2%
US avg: 1.9%
Manufacturing0.7%
US avg: 0.4%
Education & health services0.2%
US avg: 0.9%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03

Housing

Median home value
$393,500
+104%inflation adjusted, since 2000
from $105,800 in 2000
US average: $376,019
1990 – 2024
Median gross rent
$1,102
+32%inflation adjusted, since 2000
from $457 in 2000
US average: $1,442
Owner-occupied
70.1%
Unchangedsince 2000
from 70.1% in 2000
29.9% rent
Vacancy rate
8.4%
−2.7 ptssince 2009
from 11.1% in 2009
US average: 10.0%
Owner cost-burdened
23.4%
−0.8 ptssince 2009
from 24.2% in 2009
US average: 22.9%
Renter cost-burdened
38.0%
−4.5 ptssince 2009
from 42.5% in 2009
US average: 47.4%
Afford Score
5.0
+46%since 2009
from 3.4 in 2009
2009 – 2024
Our index: median home value divided by median household income. Lower is more affordable.
Gentrification Score
75
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
RELATED:See current rent listings in Lewis and Clark County on RentDataNow
Section 04

Race & ethnicity

2000
White, non-Hispanic94.4%(52,571)
Black0.2%(104)
Hispanic / Latino1.5%(843)
Asian0.5%(282)
Other0%
2024
White, non-Hispanic88.6%(65,103)
Black0.5%(385)
Hispanic / Latino4%(2,958)
Asian0.5%(359)
Other6.3%(4,659)
Diversity Score
26
+61%since 2009
from 16 in 2009
2009 – 2024
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Segregation Score
14
−14%since 2020
from 17 in 2020
Our index, 0 to 100. Higher means White and non-White residents are more separated across neighborhoods.
Section 04 · Origins

Detailed origins & ancestry

Hispanic origin
Mexican2.4%(1,771)
Puerto Rican0.4%(270)
Spaniard0.2%(135)
Cuban0.1%(103)
Colombian0.1%(69)
Peruvian0.1%(52)
Asian origin
Thai0.1%(108)
Filipino0.1%(83)
Asian Indian0.1%(40)
Korean0%(27)
Taiwanese0%(19)
Cambodian0%(18)
Japanese0%(17)
Chinese0%(2)
Pacific Islander origin
Ancestry
German23.5%(17,286)
Irish15.9%(11,681)
English15.4%(11,297)
Norwegian6.6%(4,877)
American5.9%(4,302)
Italian3.6%(2,680)
Swedish3.6%(2,646)
French3.1%(2,282)
Scottish3%(2,184)
Polish1.8%(1,328)
Scotch-Irish1.5%(1,069)
Dutch1.4%(995)
+ 34 more ancestry groups with data
Welsh1.1%(780)
Danish1%(730)
Finnish0.9%(687)
British0.7%(546)
Russian0.6%(448)
Ukrainian0.6%(432)
Romanian0.5%(384)
Austrian0.4%(309)
Czech0.4%(287)
Swiss0.4%(275)
Hungarian0.3%(256)
Greek0.3%(248)
Croatian0.3%(241)
Lithuanian0.2%(176)
Belgian0.2%(151)
Slovak0.2%(144)
West Indian0.2%(114)
Portuguese0.1%(95)
Canadian0.1%(68)
Bulgarian0.1%(49)
Armenian0.1%(40)
Arab0.1%(39)
Serbian0.1%(38)
Slovene0%(36)
Brazilian0%(16)
Nigerian0%(12)
Ethiopian0%(10)
Latvian0%(9)
RANKED:Largest German population · Largest Irish population · Largest English population · Largest Norwegian population · Largest American population
Section 05

Education

Bachelor's degree or higher
43.0%
+11.5 ptssince 2000
from 31.6% in 2000
US average: 35.6%
High school or higher
94.8%
+3.5 ptssince 2000
from 91.4% in 2000
US average: 89.6%
Graduate degree
14.6%
+4.3 ptssince 2000
from 10.3% in 2000
US average: 14.0%
Section 06

Commute & transportation

Average commute
18.3 min
+67%since 2000
from 11.0 min in 2000
US average: 26.5
Drive alone to work
68.1%
−5.0 ptssince 2009
from 73.0% in 2009
US average: 68.9%
Carpooled to work
10.8%
−1.8 ptssince 2009
from 12.6% in 2009
US average: 8.5%
Public transit
0.2%
−0.2 ptssince 2009
from 0.4% in 2009
US average: 3.2%
Worked from home
14.5%
+9.9 ptssince 2009
from 4.6% in 2009
US average: 15.0%
Walked to work
4.3%
−2.0 ptssince 2009
from 6.3% in 2009
US average: 2.4%
Biked to work
1.1%
−0.6 ptssince 2009
from 1.7% in 2009
US average: 0.4%
No vehicle available
5.3%
+0.7 ptssince 2009
from 4.7% in 2009
US average: 8.3%
Section 07

Work & employment

Unemployment rate
3.2%
−2.6 ptssince 2011
from 5.9% in 2011
US average: 5.2%
Labor force participation
63.9%
−4.8 ptssince 2011
from 68.7% in 2011
US average: 63.5%
Self-employed
18.8%
−0.5 ptssince 2009
from 19.3% in 2009
US average: 13.1%
Management & professional
50.9%
−19.4 ptssince 2009
from 70.2% in 2009
US average: 42.5%
Section 08

People & community

Male
49.6%
+0.1 ptssince 2009
from 49.5% in 2009
Female
50.4%
−0.1 ptssince 2009
from 50.5% in 2009
Foreign born
1.9%
−0.1 ptssince 2009
from 1.9% in 2009
US average: 14.1%
Veterans
9.7%
−39.0 ptssince 2009
from 48.7% in 2009
US average: 6.2%
With a disability
14.8%
+2.5 ptssince 2012
from 12.3% in 2012
US average: 13.3%
Uninsured
5.7%
−83.8 ptssince 2013
from 89.5% in 2013
US average: 8.4%
Broadband at home
90.3%
+12.0 ptssince 2017
from 78.3% in 2017
US average: 91.0%
English only at home
97.2%
−0.2 ptssince 2016
from 97.5% in 2016
US average: 77.7%
Spanish at home
0.9%
−0.5 ptssince 2016
from 1.4% in 2016
US average: 13.6%
Marital status
Men 15+
Never married30.4%(9,107)
Married53.1%(15,916)
Widowed2.5%(736)
Divorced14%(4,205)
Women 15+
Never married23.4%(7,208)
Married51.9%(15,984)
Widowed8.8%(2,718)
Divorced15.8%(4,864)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
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Head to head

Compare Lewis and Clark County to nearby counties

LEWIS AND CLARK COUNTY VS
Powell County
Income$66,923−14%
Home value$306,500−22%
Population7,157−90%
SEE FULL COMPARISON →
LEWIS AND CLARK COUNTY VS
Teton County
Income$70,430−10%
Home value$264,000−33%
Population6,496−91%
SEE FULL COMPARISON →
LEWIS AND CLARK COUNTY VS
Cascade County
Income$67,690−13%
Home value$265,300−33%
Population85,029+13%
SEE FULL COMPARISON →
LEWIS AND CLARK COUNTY VS
Broadwater County
Income$70,374−10%
Home value$426,600+8%
Population8,493−89%
SEE FULL COMPARISON →
Frequently asked

How many people live in Lewis and Clark County, Montana?

Lewis and Clark County, Montana has about 73,464 residents according to the 2024 American Community Survey.

What is the median household income in Lewis and Clark County, Montana?

The typical household in Lewis and Clark County, Montana earns about $78,237 a year. Half of households make more than that, and half make less.

Is Lewis and Clark County, Montana expensive?

In Lewis and Clark County, Montana, the median home is worth about $393,500, and the typical rent is about $1,102 a month.

How educated are people in Lewis and Clark County, Montana?

About 43.0% of adults age 25 and over in Lewis and Clark County, Montana hold a bachelor's degree or higher.

What is the poverty rate in Lewis and Clark County, Montana?

About 8.1% of people in Lewis and Clark County, Montana live below the federal poverty line.

Has Lewis and Clark County, Montana grown since 1990?

Yes, Lewis and Clark County, Montana has grown since 1990. The population has added about 25,969 residents, a change of about 55 percent over that period.

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Explore from here

17 census tracts
Census Tract 12.01Census Tract 4Census Tract 2Census Tract 12.02Census Tract 7.02Census Tract 5.03Census Tract 5.01Census Tract 11.02Census Tract 8Census Tract 9Census Tract 10Census Tract 5.04Census Tract 11.01Census Tract 3Census Tract 6Census Tract 7.01Census Tract 1
11 ZIP codes
ZIP 59601ZIP 59602ZIP 59635ZIP 59639ZIP 59625ZIP 59410ZIP 59648ZIP 59633ZIP 59640ZIP 59636ZIP 59623
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Rankings
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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →