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County ZIP codes · North Carolina · FIPS 37149

Polk County, NC ZIP Codes

Polk County, North Carolina has 7 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 6 residential and 1 for PO boxes or a single organization. 4 of the residential ones lie mainly in Polk County and 2 mainly in a neighboring county; 4 cross the county line. Median household income ranges from $56,558 in 28139 (Rutherfordton) to $72,946 in 28782 (Tryon) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Polk County?

28139 · Rutherfordton: $57k28722 · Columbus: $68k28731 · Flat Rock: $66k28756 · Mill Spring: $64k28773 · Saluda: $71k28782 · Tryon: $73k28139287562877328782287222873128139 · Rutherfordton: $57k28722 · Columbus: $68k28731 · Flat Rock: $66k28756 · Mill Spring: $64k28773 · Saluda: $71k28782 · Tryon: $73k281392875628773287822873128139 · Rutherfordton: $57k28722 · Columbus: $68k28731 · Flat Rock: $66k28756 · Mill Spring: $64k28773 · Saluda: $71k28782 · Tryon: $73k2813928756287732878228731
The residential ZIP codes of Polk 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 $63,663 and $67,760.

They carry 6 postal town names: Rutherfordton, Flat Rock, Tryon, Columbus, Mill Spring, Saluda.

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

All 6 residential ZIP codes in Polk County

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

Residential ZIP codes mainly in Polk County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
28782 Tryon 6,519 133 $73k $345k 100%
28722 Columbus 6,086 139 $68k $307k 100%
28756 Mill Spring 4,706 59 $64k $278k 99%
28773 Saluda 3,441 71 $71k $414k 74%

Partly in Polk County

Residential ZIP codes mainly in another county that reach at least 1% into Polk County, by their share here
In this county
28731 Flat Rock 8,672 262 $66k $402k 19%
28139 Rutherfordton 20,008 110 $57k $240k 13%

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 ZIP codes cross the county line?

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

Share of each ZIP code's land in Polk County and in the neighboring counties
ZIPIn PolkElsewhere
2813913%Rutherford County 87%
2873119%Henderson County 81%
2875699%Rutherford County 1%
2877374%Henderson County 26%

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

PO Box and single-organization ZIP codes

ZIP codes in Polk County without a residential area (GeoNames postal codes)
ZIPPostal name
28750Lynn

Source: GeoNames postal codes (CC BY 4.0).

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Polk County's ZIP codes use 2 prefixes: 281 and 287.

Three-digit prefixes of Polk 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 Polk County's
PrefixSectional centerHereAll codes
281 Charlotte, NC (SCF 282) 1 50
287 Greenville, SC (SCF 296) 6 87

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