ZIP Codes of Smith County, KS

Population & People
Population & People
Total Population
3,592
Household Income
Household Income
Median Income
$58,218
Housing
Housing
Total Housing Units
2,058
Business & Economy
Business & Economy
Total Businesses
127
Employment
Employment
Employment Rate
59.76%
Education
Education
Bachelor's Degree+
24.57%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 6 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:6 ZIP Codes (6 Standard, 0 PO Box, 0 Unique) [See All]
Area Code:785
Timezone:Central (GMT -06:00)
Local Time:2:12:15 PM
Population:3,592 [See All]
FIPS:20183
Land Area:846 sq mi
Water Area:2 sq mi
Coordinates:39.7527, -98.8706
Quick Link:
https://www.zip-codes.com/county/ks-smith.asp
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Kansas's #75 most populous county
3,592 residents across 6 ZIPs — #75 of 106 Kansas counties.

Standout ZIPs in this County


Most Populous
Smith Center · 1,913 people
53.3% of county total
Highest Income
Kensington · $66,875 median
1.1× county average
Largest Land Area
Smith Center · 241.2 sq mi
Spans the most ground
Fastest Growth
Smith Center · -2.4% (10-yr)
1,960 → 1,913 residents
Most Educated
Smith Center · 20.6% bachelor's+
289 of 1,401 adults 25+

Things worth knowing about Smith County


3,592 residents live across 6 ZIPs covering 846 sq mi, served by 6 distinct USPS-recognized cities.

Population moved from 3,758 to 3,592 from 2014 to 2024 — a -4.4% change. 4 ZIPs gained residents, 2 lost.

The county's wealthiest ZIP 66951 (Kensington, $66,875 median) and poorest ZIP 66952 (Lebanon, $52,188) are 22.1 miles apart — a 1.3× income gap across local geography.

Median home values vary 1.6× across this county — from $63,300 in 67638 (Gaylord) to $100,400 in 66967 (Smith Center).

Density varies across the county — from 1 people/sq mi in 67638 (Gaylord) to 8 in 66967 (Smith Center).

Educational attainment ranges from 20.6% bachelor's+ in 66967 (Smith Center) to 34.2% in 67628 (Cedar) — the breadth of educational profiles across the area.

Within Kansas, this is the #75 most populous of 106 counties and ranks #93 for median household income .

Weighted by population, the typical household earns about $59,009 across the county — reflecting what a typical resident sees, not a simple ZIP average.

24.6% of adults age 25+ hold a bachelor's degree or higher (642 of 2,613 reporting).

6 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Smith County


Big & sparse

A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
846
square miles
Avg density
4.2
people per sq mi
Population
3,592
across 6 ZIPs
Smith Center
241.2 sq mi
1,913 residents
Lebanon
238.8 sq mi
401 residents
Kensington
181.9 sq mi
920 residents

All ZIP Codes in Smith County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
66967Smith CenterStandard1,913$56,726241.2-2.4%
66951KensingtonStandard920$66,875181.99.0%
66952LebanonStandard401$52,188238.84.2%
66932AtholStandard16270.728.6%
67628CedarStandard12640.7100.0%
67638GaylordStandard70$57,08372.8-81.6%

Adjacent & Nearby Counties