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County ZIP codes · Montana · FIPS 30015

Chouteau County, MT ZIP Codes

Chouteau County, Montana has 13 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 7 of the residential ones lie mainly in Chouteau County and 6 mainly in a neighboring county; 8 cross the county line. Median household income ranges from $50,288 in 59521 (Box Elder) to $83,867 in 59404 (Great Falls) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Chouteau County?

59404 · Great Falls: $84k59405 · Great Falls: $59k59416 · Brady: $89k59420 · Carter: $88k59440 · Floweree: –59442 · Fort Benton: $68k59446 · Geraldine: $54k59447 · Geyser: $78k59450 · Highwood: $70k59460 · Loma: $52k59520 · Big Sandy: $62k59521 · Box Elder: $50k59540 · Rudyard: $74k5944259520594055944659404595405941659521594475945059460594205944059404 · Great Falls: $84k59405 · Great Falls: $59k59416 · Brady: $89k59420 · Carter: $88k59440 · Floweree: –59442 · Fort Benton: $68k59446 · Geraldine: $54k59447 · Geyser: $78k59450 · Highwood: $70k59460 · Loma: $52k59520 · Big Sandy: $62k59521 · Box Elder: $50k59540 · Rudyard: $74k59442595205940559446594045954059416595215944759450594605942059404 · Great Falls: $84k59405 · Great Falls: $59k59416 · Brady: $89k59420 · Carter: $88k59440 · Floweree: –59442 · Fort Benton: $68k59446 · Geraldine: $54k59447 · Geyser: $78k59450 · Highwood: $70k59460 · Loma: $52k59520 · Big Sandy: $62k59521 · Box Elder: $50k59540 · Rudyard: $74k594425952059405594465940459540594165952159447594505946059420
The residential ZIP codes of Chouteau County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024).<$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $59,449 and $67,917.

They carry 12 postal town names.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 13 residential ZIP codes in Chouteau County

7 ZIP codes lie mainly in Chouteau County; 6 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Chouteau County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
59442 Fort Benton 1,838 2 $68k $254k 100%
59520 Big Sandy 1,261 1 $62k $204k 97%
59446 Geraldine 629 1 $54k $153k 100%
59450 Highwood 503 1 $70k $288k 100%
59440 Floweree 432 2 – $228k 68%
59460 Loma 178 1 $52k $113k 100%
59420 Carter 164 1 $88k $117k 100%

Partly in Chouteau County

Residential ZIP codes mainly in another county that reach at least 1% into Chouteau County, by their share here
In this county
59416 Brady 425 1 $89k $163k 41%
59404 Great Falls 28,822 87 $84k $296k 28%
59521 Box Elder 3,529 12 $50k $104k 18%
59540 Rudyard 430 1 $74k $131k 4%
59447 Geyser 297 1 $78k $319k 3%
59405 Great Falls 33,350 70 $59k $250k 1%

Download the 13 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

8 ZIP codes of Chouteau County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Chouteau County and in the neighboring counties
ZIPIn ChouteauElsewhere
594051%Cascade County99%
5940428%Cascade County72%
5952118%Hill County82%
5952097%Blaine County2%
5944068%Cascade County32%
595404%Hill County96%
5941641%Pondera County56%; Teton County2%; Liberty County1%
594473%Judith Basin County97%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do Chouteau County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Chouteau County's ZIP codes use 2 prefixes: 594 and 595.

Three-digit prefixes of Chouteau County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Chouteau County's
PrefixSectional centerHereAll codes
594Great Falls, MT (SCF 594)1064
595Great Falls, MT (SCF 594)323

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.