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County ZIP codes · Montana · FIPS 30053

Lincoln County, MT ZIP Codes

Lincoln County, Montana has 7 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. Median household income ranges from $39,712 in 59935 (Troy) to $44,980 in 59923 (Libby) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Lincoln County?

59917 · Eureka: $50k59918 · Fortine: $67k59923 · Libby: $45k59930 · Rexford: $62k59933 · Stryker: –59934 · Trego: $109k59935 · Troy: $40k5992359935599175993459930599185993359917 · Eureka: $50k59918 · Fortine: $67k59923 · Libby: $45k59930 · Rexford: $62k59933 · Stryker: –59934 · Trego: $109k59935 · Troy: $40k5992359935599175993459930599185993359917 · Eureka: $50k59918 · Fortine: $67k59923 · Libby: $45k59930 · Rexford: $62k59933 · Stryker: –59934 · Trego: $109k59935 · Troy: $40k599235993559917599345993059918
The residential ZIP codes of Lincoln 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 7 postal town names: Libby, Eureka, Troy, Rexford, Trego, Fortine, Stryker.

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

All 7 residential ZIP codes in Lincoln County

Residential ZIP codes mainly in Lincoln County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
59923 Libby 10,450 7 $45k $272k 100%
59917 Eureka 4,920 20 $50k $360k 100%
59935 Troy 3,381 3 $40k $371k 100%
59930 Rexford 1,220 13 $62k $287k 100%
59934 Trego 693 6 $109k $331k 100%
59918 Fortine 509 5 $67k $353k 100%
59933 Stryker 2 0 – – 100%

Download the 7 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 first three digits do Lincoln County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Lincoln County starts with 599.

Three-digit prefixes of Lincoln 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 Lincoln County's
PrefixSectional centerHereAll codes
599 Missoula, MT (SCF 598) 7 30

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