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County ZIP codes · Kansas · FIPS 20183

Smith County, KS ZIP Codes

Smith County, Kansas has 10 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 7 of the residential ones lie mainly in Smith County and 3 mainly in a neighboring county; 6 cross the county line.

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Smith County?

66932 · Athol: –66951 · Kensington: $67k66952 · Lebanon: $52k66967 · Smith Center: $57k67430 · Cawker City: $51k67437 · Downs: $64k67474 · Portis: $81k67623 · Alton: $103k67628 · Cedar: –67638 · Gaylord: $57k6696766951669526762367437674746693267430676386762866932 · Athol: –66951 · Kensington: $67k66952 · Lebanon: $52k66967 · Smith Center: $57k67430 · Cawker City: $51k67437 · Downs: $64k67474 · Portis: $81k67623 · Alton: $103k67628 · Cedar: –67638 · Gaylord: $57k6696766951669526762367437674746693267430676386762866932 · Athol: –66951 · Kensington: $67k66952 · Lebanon: $52k66967 · Smith Center: $57k67430 · Cawker City: $51k67437 · Downs: $64k67474 · Portis: $81k67623 · Alton: $103k67628 · Cedar: –67638 · Gaylord: $57k669676695166952676236743767474674306763867628
The residential ZIP codes of Smith 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 10 residential ZIP codes in Smith County

7 ZIP codes lie mainly in Smith County; 3 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Smith County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
66967 Smith Center 1,913 8 $57k $100k 100%
66951 Kensington 920 5 $67k $97k 74%
66952 Lebanon 401 2 $52k $69k 99%
66932 Athol 162 2 – $97k 100%
67628 Cedar 126 3 – – 100%
67474 Portis 110 1 $81k – 54%
67638 Gaylord 70 1 $57k $63k 100%

Partly in Smith County

Residential ZIP codes mainly in another county that reach at least 1% into Smith County, by their share here
In this county
67437 Downs 971 8 $64k $103k 23%
67430 Cawker City 468 5 $51k $100k 6%
67623 Alton 228 1 $103k $79k 4%

Download the 10 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 Smith County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Smith County and in the neighboring counties
ZIPIn SmithElsewhere
6743723%Osborne County 77%
6695174%Phillips County 26%
674306%Jewell County 54%; Mitchell County 37%; Osborne County 3%
6695299%Jewell County 1%
676234%Osborne County 96%
6747454%Osborne County 46%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Smith County's ZIP codes use 3 prefixes: 669, 674 and 676.

Three-digit prefixes of Smith 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 Smith County's
PrefixSectional centerHereAll codes
669 Wichita, KS (SCF 670) 4 34
674 Wichita, KS (SCF 670) 3 58
676 Wichita, KS (SCF 670) 3 45

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