ZIP Codes of Cook County, GA

Population & People
Population & People
Total Population
17,544
Household Income
Household Income
Median Income
$49,721
Housing
Housing
Total Housing Units
7,535
Business & Economy
Business & Economy
Total Businesses
342
Employment
Employment
Employment Rate
55.58%
Education
Education
Bachelor's Degree+
18.35%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 4 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:4 ZIP Codes (3 Standard, 1 PO Box, 0 Unique) [See All]
Area Code:229
Timezone:Eastern (GMT -05:00)
Local Time:2:11:42 PM
Population:17,544 [See All]
FIPS:13075
Land Area:254 sq mi
Water Area:5 sq mi
Coordinates:31.1690, -83.4281
Quick Link:
https://www.zip-codes.com/county/ga-cook.asp
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Georgia's #98 most populous county
17,544 residents across 4 ZIPs — #98 of 161 Georgia counties.

Standout ZIPs in this County


Most Populous
Adel · 10,969 people
62.5% of county total
Highest Income
Lenox · $65,391 median
1.3× county average
Largest Land Area
Adel · 126.8 sq mi
Spans the most ground
Fastest Growth
Lenox · 8.8% (10-yr)
2,957 → 3,217 residents
Most Educated
Adel · 21.6% bachelor's+
1,476 of 6,841 adults 25+

Things worth knowing about Cook County


17,544 residents live across 4 ZIPs covering 254 sq mi, served by 4 distinct USPS-recognized cities.

Population moved from 17,315 to 17,544 from 2014 to 2024 — a +1.3% change. 3 ZIPs gained residents, 1 lost.

The county's wealthiest ZIP 31637 (Lenox, $65,391 median) and poorest ZIP 31627 (Cecil, $29,500) are 17.5 miles apart — a 2.2× income gap across local geography.

Median home values vary 2.2× across this county — from $74,300 in 31627 (Cecil) to $160,500 in 31620 (Adel).

Density varies across the county — from 39 people/sq mi in 31637 (Lenox) to 86 in 31620 (Adel).

Educational attainment ranges from 1.6% bachelor's+ in 31627 (Cecil) to 21.6% in 31620 (Adel) — the breadth of educational profiles across the area.

Within Georgia, this is the #98 most populous of 161 counties and ranks #138 for median household income .

Weighted by population, the typical household earns about $53,905 across the county — reflecting what a typical resident sees, not a simple ZIP average.

18.4% of adults age 25+ hold a bachelor's degree or higher (2,085 of 11,362 reporting).

3 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Cook County


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.

Adel

All ZIP Codes in Cook County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
31620AdelStandard10,969$51,597126.81.2%
31637LenoxStandard3,217$65,39182.38.8%
31647SparksStandard3,071$52,39645.4-6.5%
31627CecilPO Box287$29,5000.023.7%

Adjacent & Nearby Counties