ZIP Codes of Lyon County, KS

Population & People
Population & People
Total Population
32,738
Household Income
Household Income
Median Income
$72,890
Housing
Housing
Total Housing Units
15,202
Business & Economy
Business & Economy
Total Businesses
840
Employment
Employment
Employment Rate
67.44%
Education
Education
Bachelor's Degree+
26.00%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 8 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:8 ZIP Codes (8 Standard, 0 PO Box, 0 Unique) [See All]
Area Code:620
Timezone:Central (GMT -06:00)
Local Time:2:12:13 PM
Population:32,738 [See All]
FIPS:20111
CBSA:Emporia, KS
Land Area:909 sq mi
Water Area:9 sq mi
Coordinates:38.4514, -96.1204
Quick Link:
https://www.zip-codes.com/county/ks-lyon.asp
Need Lyon data in your app? Look up ZIP, county, and city data with a single API call.
Try Free
Notable income spread
Median income ranges $37,422 to $103,393 across ZIPs — a 2.8× gap.
Among Kansas's 5 most renter-heavy counties
42.2% of homes rented — #4 statewide.

Standout ZIPs in this County


Most Populous
Emporia · 27,585 people
84.3% of county total
Highest Income
Reading · $103,393 median
1.4× county average
Largest Land Area
Emporia · 293.2 sq mi
Spans the most ground
Fastest Growth
Americus · 9.8% (10-yr)
1,095 → 1,202 residents
Most Educated
Emporia · 26.6% bachelor's+
4,412 of 16,562 adults 25+

Things worth knowing about Lyon County


32,738 residents live across 8 ZIPs covering 909 sq mi, served by 8 distinct USPS-recognized cities.

Population moved from 33,688 to 32,738 from 2014 to 2024 — a -2.8% change. 5 ZIPs gained residents, 3 lost.

The county's wealthiest ZIP 66868 (Reading, $103,393 median) and poorest ZIP 66864 (Neosho Rapids, $37,422) are 13.9 miles apart — a 2.8× income gap across local geography.

Median home values vary 3.1× across this county — from $58,300 in 66864 (Neosho Rapids) to $181,600 in 66865 (Olpe).

Density varies 20× across the county — from 5 people/sq mi in 66833 (Allen) to 94 in 66801 (Emporia).

Educational attainment ranges from 8.2% bachelor's+ in 66854 (Hartford) to 33.9% in 66865 (Olpe) — the breadth of educational profiles across the area.

Within Kansas, this is the #17 most populous of 106 counties and ranks #31 for median household income .

Weighted by population, the typical household earns about $60,812 across the county — reflecting what a typical resident sees, not a simple ZIP average.

26.0% of adults age 25+ hold a bachelor's degree or higher (5,164 of 19,859 reporting).

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

Stories about Lyon 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
909
square miles
Avg density
36.0
people per sq mi
Population
32,738
across 8 ZIPs
Emporia
293.2 sq mi
27,585 residents
Allen
138.2 sq mi
641 residents
Reading
131.7 sq mi
620 residents

Single-ZIP anchor

One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.

Emporia

All ZIP Codes in Lyon County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
66801EmporiaStandard27,585$56,794293.2-4.0%
66835AmericusStandard1,202$81,00055.49.8%
66865OlpeStandard1,105$93,333120.12.6%
66854HartfordStandard1,007$96,25098.416.1%
66833AllenStandard641$57,819138.20.6%
66868ReadingStandard620$103,393131.7-14.6%
66864Neosho RapidsStandard375$37,42238.4-6.0%
66830AdmireStandard203$57,10933.926.9%

Adjacent & Nearby Counties