ZIP Codes of Roger Mills County, OK

Population & People
Population & People
Total Population
3,525
Household Income
Household Income
Median Income
$67,344
Housing
Housing
Total Housing Units
1,885
Business & Economy
Business & Economy
Total Businesses
75
Employment
Employment
Employment Rate
58.20%
Education
Education
Bachelor's Degree+
25.10%
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:580
Timezone:Central (GMT -06:00)
Local Time:2:13:26 PM
Population:3,525 [See All]
FIPS:40129
Land Area:1,061 sq mi
Water Area:5 sq mi
Coordinates:35.6659, -99.7528
Quick Link:
https://www.zip-codes.com/county/ok-roger-mills.asp
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Oklahoma's #75 most populous county
3,525 residents across 6 ZIPs — #75 of 78 Oklahoma counties.

Standout ZIPs in this County


Most Populous
Cheyenne · 1,677 people
47.6% of county total
Highest Income
Crawford · $83,750 median
1.2× county average
Largest Land Area
Cheyenne · 389.2 sq mi
Spans the most ground
Fastest Growth
Cheyenne · -5.5% (10-yr)
1,775 → 1,677 residents
Most Educated
Cheyenne · 25.0% bachelor's+
281 of 1,126 adults 25+

Things worth knowing about Roger Mills County


3,525 residents live across 6 ZIPs covering 1,061 sq mi, served by 6 distinct USPS-recognized cities.

Population moved from 3,764 to 3,525 from 2014 to 2024 — a -6.3% change. 2 ZIPs gained residents, 4 lost.

The county's wealthiest ZIP 73638 (Crawford, $83,750 median) and poorest ZIP 73666 (Sweetwater, $56,875) are 29.9 miles apart — a 1.5× income gap across local geography.

Median home values vary 3.0× across this county — from $58,600 in 73642 (Durham) to $175,000 in 73638 (Crawford).

Density varies across the county — from 1 people/sq mi in 73642 (Durham) to 5 in 73650 (Hammon).

Educational attainment ranges from 18.0% bachelor's+ in 73642 (Durham) to 29.3% in 73660 (Reydon) — the breadth of educational profiles across the area.

Within Oklahoma, this is the #75 most populous of 78 counties and ranks #20 for median household income .

Weighted by population, the typical household earns about $65,617 across the county — reflecting what a typical resident sees, not a simple ZIP average.

25.1% of adults age 25+ hold a bachelor's degree or higher (605 of 2,410 reporting).

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

Stories about Roger Mills 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
1,061
square miles
Avg density
3.3
people per sq mi
Population
3,525
across 6 ZIPs
Cheyenne
389.2 sq mi
1,677 residents
Hammon
162.7 sq mi
893 residents
Sweetwater
134.6 sq mi
329 residents

Population decline

Roger Mills County lost 6.3% of residents between 2014 and 2024. ZIPs that shed the largest share:

Hammon
-20.6%
1,124 → 893 residents

All ZIP Codes in Roger Mills County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
73628CheyenneStandard1,677$63,177389.2-5.5%
73650HammonStandard893$71,250162.7-20.6%
73660ReydonStandard336$61,667122.8-11.6%
73666SweetwaterStandard329$56,875134.664.5%
73638CrawfordStandard180$83,750129.647.5%
73642DurhamStandard110122.3-32.5%

Adjacent & Nearby Counties