ZIP Codes of Marshall County, OK

Population & People
Population & People
Total Population
15,838
Household Income
Household Income
Median Income
$59,455
Housing
Housing
Total Housing Units
8,855
Business & Economy
Business & Economy
Total Businesses
318
Employment
Employment
Employment Rate
50.14%
Education
Education
Bachelor's Degree+
18.12%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 3 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:3 ZIP Codes (3 Standard, 0 PO Box, 0 Unique) [See All]
Area Code:580
Timezone:Central (GMT -06:00)
Local Time:2:13:25 PM
Population:15,838 [See All]
FIPS:40095
Land Area:434 sq mi
Water Area:55 sq mi
Coordinates:33.9890, -96.7919
Quick Link:
https://www.zip-codes.com/county/ok-marshall.asp
Need Marshall data in your app? Look up ZIP, county, and city data with a single API call.
Try Free
Oklahoma's #45 most populous county
15,838 residents across 3 ZIPs — #45 of 78 Oklahoma counties.

Standout ZIPs in this County


Most Populous
Madill · 8,479 people
53.5% of county total
Highest Income
Lebanon · $64,038 median
1.1× county average
Largest Land Area
Madill · 253.6 sq mi
Spans the most ground
Fastest Growth
Madill · 4.8% (10-yr)
8,090 → 8,479 residents
Most Educated
Madill · 19.3% bachelor's+
1,071 of 5,535 adults 25+

Things worth knowing about Marshall County


15,838 residents live across 3 ZIPs covering 434 sq mi, served by 3 distinct USPS-recognized cities.

Population moved from 15,964 to 15,838 from 2014 to 2024 — a -0.8% change. 2 ZIPs gained residents, 1 lost.

The county's wealthiest ZIP 73440 (Lebanon, $64,038 median) and poorest ZIP 73439 (Kingston, $55,865) are 9.0 miles apart — a 1.1× income gap across local geography.

Median home values vary 1.5× across this county — from $116,700 in 73440 (Lebanon) to $171,100 in 73439 (Kingston).

Density varies across the county — from 16 people/sq mi in 73440 (Lebanon) to 43 in 73439 (Kingston).

Educational attainment ranges from 16.2% bachelor's+ in 73439 (Kingston) to 43.9% in 73440 (Lebanon) — the breadth of educational profiles across the area.

Within Oklahoma, this is the #45 most populous of 78 counties and ranks #39 for median household income .

Weighted by population, the typical household earns about $57,368 across the county — reflecting what a typical resident sees, not a simple ZIP average.

18.1% of adults age 25+ hold a bachelor's degree or higher (1,985 of 10,952 reporting).

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

All ZIP Codes in Marshall County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
73446MadillStandard8,479$58,462253.64.8%
73439KingstonStandard7,141$55,865167.4-6.8%
73440LebanonStandard218$64,03813.34.8%

Adjacent & Nearby Counties