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County ZIP codes · Montana · FIPS 30075

Powder River County, MT ZIP Codes

Powder River County, Montana has 9 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 7 of the residential ones lie mainly in Powder River County and 2 mainly in a neighboring county; 6 cross the county line. Median household income ranges from $44,833 in 59003 (Ashland) to $71,332 in 59301 (Miles City) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Powder River County?

59003 · Ashland: $45k59062 · Otter: $29k59301 · Miles City: $71k59314 · Biddle: $92k59316 · Boyes: $49k59317 · Broadus: $71k59343 · Olive: –59345 · Powderville: $68k59351 · Volborg: –59301593175900359351593455906259314593435931659003 · Ashland: $45k59062 · Otter: $29k59301 · Miles City: $71k59314 · Biddle: $92k59316 · Boyes: $49k59317 · Broadus: $71k59343 · Olive: –59345 · Powderville: $68k59351 · Volborg: –593015931759003593515934559062593145934359003 · Ashland: $45k59062 · Otter: $29k59301 · Miles City: $71k59314 · Biddle: $92k59316 · Boyes: $49k59317 · Broadus: $71k59343 · Olive: –59345 · Powderville: $68k59351 · Volborg: –5930159317590035935159345590625931459343
The residential ZIP codes of Powder River 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?

They carry 9 postal town names.

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

All 9 residential ZIP codes in Powder River County

7 ZIP codes lie mainly in Powder River County; 2 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Powder River County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
59003 Ashland 1,334 2 $45k $76k 61%
59317 Broadus 1,108 1 $71k $197k 100%
59351 Volborg 202 0 – $118k 60%
59314 Biddle 155 0 $92k – 100%
59062 Otter 51 0 $29k – 69%
59343 Olive 21 0 – – 100%
59316 Boyes 15 0 $49k – 70%

Partly in Powder River County

Residential ZIP codes mainly in another county that reach at least 1% into Powder River County, by their share here
In this county
59345 Powderville 35 0 $68k $225k 32%
59301 Miles City 11,643 4 $71k $218k 2%

Download the 9 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?

6 ZIP codes of Powder River County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Powder River County and in the neighboring counties
ZIPIn Powder RiverElsewhere
593012%Custer County81%; Rosebud County10%; Garfield County5%; Prairie County1%
5900361%Rosebud County39%
5935160%Custer County40%
5906269%Rosebud County31%
5934532%Custer County68%
5931670%Carter County30%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Powder River County's ZIP codes use 2 prefixes: 590 and 593.

Three-digit prefixes of Powder River 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 Powder River County's
PrefixSectional centerHereAll codes
590Billings, MT (SCF 590)275
593Billings, MT (SCF 590)731

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