ZIP Codes of Greer County, OK

Population & People
Population & People
Total Population
5,464
Household Income
Household Income
Median Income
$59,552
Housing
Housing
Total Housing Units
2,638
Business & Economy
Business & Economy
Total Businesses
69
Employment
Employment
Employment Rate
40.93%
Education
Education
Bachelor's Degree+
14.20%
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:2:13:24 PM
Population:5,464 [See All]
FIPS:40055
Land Area:707 sq mi
Water Area:5 sq mi
Coordinates:34.9601, -99.5372
Quick Link:
https://www.zip-codes.com/county/ok-greer.asp
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Notable population decline
Lost 10.6% of residents since 2014.

Standout ZIPs in this County


Most Populous
Mangum · 3,309 people
60.6% of county total
Highest Income
Granite · $64,444 median
1.1× county average
Largest Land Area
Mangum · 330.5 sq mi
Spans the most ground
Fastest Growth
Mangum · -5.0% (10-yr)
3,482 → 3,309 residents
Most Educated
Mangum · 17.4% bachelor's+
357 of 2,047 adults 25+

Things worth knowing about Greer County


5,464 residents live across 3 ZIPs covering 707 sq mi, served by 3 distinct USPS-recognized cities.

Population moved from 6,110 to 5,464 from 2014 to 2024 — a -10.6% change. 0 ZIPs gained residents, 3 lost.

The county's wealthiest ZIP 73547 (Granite, $64,444 median) and poorest ZIP 73554 (Mangum, $56,400) are 11.3 miles apart — a 1.1× income gap across local geography.

Median home values vary 1.1× across this county — from $105,900 in 73554 (Mangum) to $120,500 in 73547 (Granite).

Density varies 11× across the county — from 1 people/sq mi in 73673 (Willow) to 14 in 73547 (Granite).

Educational attainment ranges from 10.3% bachelor's+ in 73547 (Granite) to 17.4% in 73554 (Mangum) — the breadth of educational profiles across the area.

Within Oklahoma, this is the #67 most populous of 78 counties and ranks #38 for median household income .

Weighted by population, the typical household earns about $59,206 across the county — reflecting what a typical resident sees, not a simple ZIP average.

14.2% of adults age 25+ hold a bachelor's degree or higher (550 of 3,872 reporting).

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

Stories about Greer 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
707
square miles
Avg density
7.7
people per sq mi
Population
5,464
across 3 ZIPs
Mangum
330.5 sq mi
3,309 residents
Willow
242.8 sq mi
302 residents
Granite
133.9 sq mi
1,853 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.

Mangum

Population decline

Greer County lost 10.6% of residents between 2014 and 2024. ZIPs that shed the largest share:

Granite
-19.1%
2,291 → 1,853 residents

All ZIP Codes in Greer County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
73554MangumStandard3,309$56,400330.5-5.0%
73547GraniteStandard1,853$64,444133.9-19.1%
73673WillowStandard302$57,813242.8-10.4%

Adjacent & Nearby Counties