Residential delivery area · Montana
ZIP Code 59323: Colstrip, MT
ZIP code 59323 uses the postal name Colstrip, Montana and lies entirely in Rosebud County (Census 2020 ZIP-county file). About 2,100 people live there (Census Bureau, ACS 2020-2024). Median household income is $82,500 (Census Bureau, ACS 2020-2024). By Census place, 8% of its land lies in Colstrip; 92% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- Town
- Colstrip · its only residential ZIP
- County
- Rosebud County
- Census places
- Colstrip
- House district
- MT-2 119th Congress
- State
- Montana
- Time zone
- Mountain
- Land area
- 53.4 sq mi · 39 people per sq mi
Where is ZIP code 59323?
59323 centers on 45.917°, -106.722° and covers 53.4 square miles of land plus 0.3 of water. It borders 1 ZIP code: 59327.
The map draws ZIP code areas only. For the streets inside 59323, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 59323 compare with the rest of Rosebud County?
| Measure | 59323 | In Rosebud County | In MT |
|---|---|---|---|
| People (ACS 2020-2024) | 2,101 | 4th of 12 | 88th of 369 |
| Median household income | $83k | not ranked | not ranked |
| Median home value | $195k | 3rd of 4 | 100th of 120 |
59323's median household income is not ranked: its 90% margin of error (±$51,101) is more than a quarter of the figure ($82,500). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
It is denser than 38% of U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 59323?
The 2020 Census counted 2,129 people in 59323; the ACS, which samples households over 2020-2024, estimates 2,101. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 2,101±286 (90% margin)
- 2020 Census count
- 2,129
- Households
- 802
- Median age
- 44.2
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 59323?
Of the 2,101 people the ACS estimates in 59323, 27.2% are under 18 and 13.5% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (67.7%), then Other or two or more (25.0%).
- Under 1827.2%
- 18 to 6459.3%
- 65 and older13.5%
- White, not Hispanic67.7%
- Other or two or more25.0%
- Hispanic or Latino7.2%
- Black, not Hispanic0.0%
- Asian, not Hispanic0.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 59323 earn?
Median household income is $82,500 (ACS 2020-2024).
- Median household income
- $82,500±$51,101
- Income per person
- $42,447
- Below the poverty line
- 9.4%
- Unemployed (of the labor force)
- 8.2%
- Adults 25+ with a bachelor's degree
- 25.9%
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 59323?
FHFA's house price index for 59323, built from repeat sales and appraisals of the same homes, rose 49% from 2015 to 2025 and rose 78% from 2020 to 2025, and moved +4.0% in 2025.
- Median home value (owners' estimate)
- $194,900
- Median gross rent
- $659
- Homes owned by their occupants
- 82.8%
- Housing units
- 940
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 59323?
56 business establishments had a location in this ZIP code in 2023, 3 more than in 2018; the most are in accommodation and food services (ZIP Code Business Patterns).
- Accommodation and food services10
- Other services (except public administration)8
- Administrative and support and waste management and remediation services7
- Construction6
- Arts, entertainment, and recreation5
- Utilities3
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 59323?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 59327 | Forsyth | 2,610 | $53k | 22.2 mi |
| 59043 | Lame Deer | 2,727 | $29k | 25.4 mi (near) |
| 59010 | Bighorn | 220 | $73k | 27.9 mi (near) |
| 59076 | Sanders | 26 | – | 30.2 mi (near) |
| 59038 | Hysham | 750 | $57k | 31.4 mi (near) |
| 59016 | Busby | 1,044 | $59k | 33.5 mi (near) |
| 59022 | Crow Agency | 2,307 | $53k | 35.4 mi (near) |
| 59333 | Hathaway | 10 | – | 35.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.