Residential delivery area · Montana
ZIP Code 59865: Saint Ignatius, MT
ZIP code 59865 uses the postal name Saint Ignatius, Montana and lies entirely in Lake County (Census 2020 ZIP-county file). About 3,600 people live there (Census Bureau, ACS 2020-2024). Median household income is $56,473 (Census Bureau, ACS 2020-2024). By Census place, under 1% of its land lies in St. Ignatius; more than 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Saint Ignatius · its only residential ZIP
- County
- Lake County
- Census places
- St. Ignatius
- House district
- MT-1 119th Congress
- State
- Montana
- Time zone
- Mountain
- Land area
- 162.9 sq mi · 22 people per sq mi
Where is ZIP code 59865?
59865 centers on 47.332°, -113.998° and covers 162.9 square miles of land plus 2.0 of water. It borders 5 ZIP codes: 59821, 59863, 59824, 59864, 59826.
The map draws ZIP code areas only. For the streets inside 59865, 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 59865 compare with the rest of Lake County?
| Measure | 59865 | In Lake County | In MT |
|---|---|---|---|
| People (ACS 2020-2024) | 3,635 | 4th of 15 | 59th of 369 |
| Median household income | $57k | 5th of 7 | 88th of 104 |
| Median home value | $345k | 4th of 7 | 61st of 120 |
Its median household income is higher than in 23% of U.S. residential ZIP codes, and it is denser than 28% of all 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 59865?
The 2020 Census counted 3,338 people in 59865; the ACS, which samples households over 2020-2024, estimates 3,635. Between the 2010 and 2020 censuses its population grew 4.8% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 3,635±391 (90% margin)
- 2020 Census count
- 3,338+4.8% since 2010 (3,185)
- Households
- 1,268
- Median age
- 38.3
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 59865?
Of the 3,635 people the ACS estimates in 59865, 28.0% are under 18 and 20.2% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (55.5%), then Other or two or more (38.8%).
- Under 1828.0%
- 18 to 6451.9%
- 65 and older20.2%
- White, not Hispanic55.5%
- Other or two or more38.8%
- Hispanic or Latino4.4%
- Black, not Hispanic1.0%
- Asian, not Hispanic0.4%
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 59865 earn?
Median household income is $56,473 (ACS 2020-2024), the 5th highest of the 7 ranked ZIP codes in Lake County. It is not measurably different from 2015-2019 ($57,142 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $56,473
- Income per person
- $27,171
- Below the poverty line
- 17.9%
- Unemployed (of the labor force)
- 8.3%
- Adults 25+ with a bachelor's degree
- 25.1%
- Adjusted gross income per tax return, 2022
- $65,9341,460 returns; wages 58% of AGI (IRS)
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 59865?
FHFA's house price index for 59865, built from repeat sales and appraisals of the same homes, rose 93% from 2015 to 2025 and rose 62% from 2020 to 2025, and moved −2.3% in 2025.
- Median home value (owners' estimate)
- $345,300
- Median gross rent
- $723
- Homes owned by their occupants
- 73.3%
- Housing units
- 1,413
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 59865?
98 business establishments had a location in this ZIP code in 2023, 22 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction29
- Manufacturing9
- Retail trade9
- Accommodation and food services7
- Transportation and warehousing6
- Professional, scientific, and technical services6
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 59865?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 59821 | Arlee | 2,994 | $67k | 8.6 mi |
| 59863 | Ravalli | 146 | $79k | 8.9 mi |
| 59824 | Charlo | 1,526 | $53k | 11.3 mi |
| 59864 | Ronan | 7,301 | $62k | 14.9 mi |
| 59826 | Condon | 518 | $53k | 16.4 mi |
| 59831 | Dixon | 544 | $46k | 18.0 mi (near) |
| 59855 | Pablo | 419 | $33k | 19.3 mi (near) |
| 59834 | Frenchtown | 2,444 | $94k | 20.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.