PlainZIP

Saint Marie, MT · standard

ZIP Code 59231

Valley County, Montana - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

264
51/sq mi
$38,971
Median income
$18,800
Median home value
23.1%
Bachelor's or higher

The verdict

Saint Marie pairs one of the lowest household incomes in the country with among the most affordable home values nationally, in a rural, homeowner-dominated area.

5th pct
household income, US ZIPs
0th pct
home value, US ZIPs
51
people per sq mi
89%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 59231 against every reporting US ZIP.

ZIP code 59231 is a sparsely populated ZIP (a standard USPS delivery area) in Saint Marie, Valley County, Montana, home to just 264 residents across 5.2 square miles, a density of 51 people per square mile, in the Denver time zone.

ZIP 59231 sits on the lower end of the income spectrum: median household income is $38,971 (44% below the Montana average), while per-capita income is $16,911. Poverty here runs at 23.9%, with unemployment measured at 18.9%. On housing, the median home value is $18,800 (94% below the state average) with median rent at - per month, and 89.1% of occupied units are owner-occupied.

Educational attainment sits below the national norm: 23.1% of adults hold a bachelor's degree or higher, the median age is 37.9, and the average commute is -. Montana and national benchmarks, shown above, are the best way to contextualize 59231, not the raw numbers alone.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 59231, Saint Marie, MT · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

264

Population

5.2

Area (sq mi)

51

People / sq mi

Denver

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 59231?

37.9

Median Age

30.1%

Male

69.9%

Female

0.0%

Foreign-Born

White 55.9%
African American 0.0%
Asian 0.0%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 44.1%
Hispanic or Latino 0.0%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$38,971

Median Household Income

-44% vs state

$16,911

Per Capita Income

23.9%

Poverty Rate

18.9%

Unemployment Rate

How ZIP 59231 ranks nationally

Saint Marie, MT household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$38,971 5th percentile higher than 5% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). This entry sits in this band. $40,000–$60,000: 7,092 US ZIPs (23%). Above this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Above this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Above this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Above this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 43.7%
Bachelor's Degree or Higher 23.1%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

688

Total Housing Units

92

Occupied Units

596

Vacant Units

3.33

Avg Household Size

Occupancy Type

Owner 89.1%
Renter 10.9%

$18,800

Median Home Value

-94% vs state

1964

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What businesses operate in this ZIP?

Census Bureau data shows 3 business establishments in ZIP 59231, employing approximately 11 people with a combined annual payroll of $692,000.

3

Businesses

11

Employees

$692K

Annual Payroll

0

Industry Sectors

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

More ZIP Codes in Valley County

59230 standard
Glasgow, MT
Pop: 4,490
59248 standard
Nashua, MT
Pop: 762
59225 standard
Frazer, MT
Pop: 560
59241 standard
Hinsdale, MT
Pop: 413
59223 standard
Fort Peck, MT
Pop: 364
59250 standard
Opheim, MT
Pop: 198

Related Areas

Valley County Saint Marie, MT Montana

Frequently Asked Questions

What county is ZIP code 59231 in? ▼
ZIP code 59231 (Saint Marie) is located in Valley County, Montana. Valley County contains multiple ZIP codes, see the full list at /counties/valley-mt.
What is the population of ZIP code 59231? ▼
ZIP code 59231 in Saint Marie, MT has a population of 264 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 59231? ▼
The median household income in ZIP 59231 is $38,971, which is 49% below the national average of $76,288.
What is the average home value in ZIP 59231? ▼
The median home value in ZIP 59231 is $18,800, which is 93% below the national average of $278,155.
What is the demographic makeup of ZIP 59231? ▼
The largest racial group in ZIP 59231 is White at 55.9%.
How many businesses are in ZIP code 59231? ▼
ZIP code 59231 has 3 business establishments employing approximately 11 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 59231? ▼
In ZIP code 59231, 43.7% of residents aged 25+ have a high school diploma or higher, and 23.1% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 59231? ▼
In ZIP code 59231, approximately 89.1% of occupied housing units are owner-occupied and 10.9% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 59231? ▼
The poverty rate in ZIP code 59231 is 23.9% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.