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County ZIP codes · Montana · FIPS 30107

Wheatland County, MT ZIP Codes

Wheatland County, Montana has 6 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 4 of the residential ones lie mainly in Wheatland County and 2 mainly in a neighboring county; 4 cross the county line.

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Wheatland County?

59036 · Harlowton: $50k59053 · Martinsdale: $44k59074 · Ryegate: $50k59078 · Shawmut: $27k59085 · Two Dot: –59453 · Judith Gap: $59k59074590365905359078594535908559036 · Harlowton: $50k59053 · Martinsdale: $44k59074 · Ryegate: $50k59078 · Shawmut: $27k59085 · Two Dot: –59453 · Judith Gap: $59k59074590365905359078594535908559036 · Harlowton: $50k59053 · Martinsdale: $44k59074 · Ryegate: $50k59078 · Shawmut: $27k59085 · Two Dot: –59453 · Judith Gap: $59k590745903659053590785945359085
The residential ZIP codes of Wheatland 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).

All 6 residential ZIP codes in Wheatland County

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

Residential ZIP codes mainly in Wheatland County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
59036 Harlowton 1,530 2 $50k $186k 100%
59453 Judith Gap 331 1 $59k $170k 77%
59078 Shawmut 115 0 $27k $142k 69%
59085 Two Dot 83 0 – $66k 100%

Partly in Wheatland County

Residential ZIP codes mainly in another county that reach at least 1% into Wheatland County, by their share here
In this county
59053 Martinsdale 412 1 $44k $187k 3%
59074 Ryegate 413 1 $50k $169k 2%

Download the 6 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?

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

Share of each ZIP code's land in Wheatland County and in the neighboring counties
ZIPIn WheatlandElsewhere
590742%Golden Valley County91%; Stillwater County7%
590533%Meagher County97%
5945377%Fergus County19%; Judith Basin County5%
5907869%Golden Valley County22%; Sweet Grass County8%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Wheatland County's ZIP codes use 2 prefixes: 590 and 594.

Three-digit prefixes of Wheatland 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 Wheatland County's
PrefixSectional centerHereAll codes
590Billings, MT (SCF 590)575
594Great Falls, MT (SCF 594)164

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