ZIP Codes of Washington County, GA

Population & People
Population & People
Total Population
19,677
Household Income
Household Income
Median Income
$48,936
Housing
Housing
Total Housing Units
8,561
Business & Economy
Business & Economy
Total Businesses
343
Employment
Employment
Employment Rate
47.94%
Education
Education
Bachelor's Degree+
16.99%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 6 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:6 ZIP Codes (5 Standard, 1 PO Box, 0 Unique) [See All]
Area Code:478
Timezone:Eastern (GMT -05:00)
Local Time:11:53:07 PM
Population:19,677 [See All]
FIPS:13303
Land Area:645 sq mi
Water Area:6 sq mi
Coordinates:32.9342, -82.8130
Quick Link:
https://www.zip-codes.com/county/ga-washington.asp
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Georgia's #91 most populous county
19,677 residents across 6 ZIPs — #91 of 161 Georgia counties.

Standout ZIPs in this County


Most Populous
Sandersville · 10,236 people
52.0% of county total
Highest Income
Oconee · $58,942 median
1.2× county average
Largest Land Area
Sandersville · 234.1 sq mi
Spans the most ground
Fastest Growth
Sandersville · 0.7% (10-yr)
10,166 → 10,236 residents
Most Educated
Sandersville · 21.3% bachelor's+
1,419 of 6,670 adults 25+

Things worth knowing about Washington County


19,677 residents live across 6 ZIPs covering 645 sq mi, served by 6 distinct USPS-recognized cities.

Population moved from 20,532 to 19,677 from 2014 to 2024 — a -4.2% change. 2 ZIPs gained residents, 4 lost.

The county's wealthiest ZIP 31067 (Oconee, $58,942 median) and poorest ZIP 31089 (Tennille, $36,094) are 5.7 miles apart — a 1.6× income gap across local geography.

Median home values vary 2.4× across this county — from $78,900 in 31035 (Harrison) to $185,500 in 31094 (Warthen).

Density varies 66× across the county — from 8 people/sq mi in 31094 (Warthen) to 516 in 31067 (Oconee).

Educational attainment ranges from 1.4% bachelor's+ in 31067 (Oconee) to 21.3% in 31082 (Sandersville) — the breadth of educational profiles across the area.

Within Georgia, this is the #91 most populous of 161 counties and ranks #140 for median household income .

Weighted by population, the typical household earns about $50,189 across the county — reflecting what a typical resident sees, not a simple ZIP average.

17.0% of adults age 25+ hold a bachelor's degree or higher (2,325 of 13,682 reporting).

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

Stories about Washington 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
645
square miles
Avg density
30.5
people per sq mi
Population
19,677
across 6 ZIPs
Sandersville
234.1 sq mi
10,236 residents
Tennille
158.2 sq mi
4,239 residents
Warthen
105.3 sq mi
817 residents

All ZIP Codes in Washington County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
31082SandersvilleStandard10,236$57,308234.10.7%
31089TennilleStandard4,239$36,094158.2-10.5%
31018DavisboroStandard2,827$48,02496.5-0.9%
31035HarrisonStandard1,258$41,56350.2-8.8%
31094WarthenStandard817$51,688105.3-28.4%
31067OconeePO Box300$58,9420.616.3%

Adjacent & Nearby Counties