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zipcodes.pro — STATE/KS/COUNTY/THOMAS

Thomas County, KS ZIP codes

Thomas County, KS has 5 ZIP codes, in 5 towns: 67701, 67732, 67753, 67734 and 67743. 1 more crosses into it from a neighbouring county: 67748.

The county seat is Colby.

ZIP codes
5
Partly in it
1 more
Towns
5
County seat
Colby
County FIPS
20193
State
Kansas
Population
7,885
Median household income
$71,325
Land area
1,075 sq mi

Thomas County ZIP codes by town

Colby (county seat)
67701

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

ZIP codes partly in Thomas County

This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Thomas County.

Map of Thomas County ZIP codes

6770167732677346774367753

The ZIP codes of Thomas County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Thomas County in numbers

About 7,885 people live in Thomas County, in 3,139 households, the 48th most populous of Kansas's 105 counties. The median household income is $71,325 a year, 4% below the Kansas median of $74,275 (US: $80,734). The median owner-occupied home is valued at $172,700 (20% below the Kansas median), and median gross rent is $752 a month. The median age is 35.3; 34.6% of adults 25 and over hold a bachelor's degree or higher (35.6% across Kansas); the average commute takes 12 minutes.

Population7,885Thomas7,885
Households3,139Thomas3,139
Median age35.3Thomas35.3Kansas37.4US 38.9
Median household income$71,325Thomas$71,325Kansas$74,275US $80,734
Median home value$172,700Thomas$172,700Kansas$217,200US $332,700
Median gross rent$752Thomas$752Kansas$1,060US $1,413
Bachelor's degree or higher34.6%Thomas34.6%Kansas35.6%US 35.7%
Mean commute11.7 minThomas11.7 minKansas19.7 minUS 26.4 min
Population density7 / sq miThomas7 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Thomas County

Largest towns in Thomas County
TownZIP codesPopulation
Colby 1 5,387
Brewster 1 459
Rexford 1 146
Gem 1 98
Levant 1 63

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Thomas County.

Not sure you are in Thomas County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Thomas County, with figures

ZIP codes in Thomas County
ZIP City Type Population Median income Median home
67701 Colby , KS Standard 6,134 $70,250 $177,300
67732 Brewster , KS Standard 691 $64,938 $144,400
67734 Gem , KS Standard 175 — —
67743 Levant , KS Standard 200 $56,910 —
67753 Rexford , KS Standard 407 $62,396 $122,800

Cite this page

zipcodes.pro. “Thomas County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/ks/county/thomas

Underlying data is public domain or openly licensed — sources, vintages and licences.