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zipcodes.pro — STATE/GA/COUNTY/LAMAR

Lamar County, GA ZIP codes

Lamar County, GA has 2 ZIP codes, in 2 towns: 30204 and 30257.

The county seat is Barnesville.

ZIP codes
2
Towns
2
County seat
Barnesville
County FIPS
13171
State
Georgia
Population
19,571
Median household income
$67,062
Land area
184 sq mi

Lamar County ZIP codes by town

Barnesville (county seat)
30204

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of Lamar County ZIP codes

3020430257

The ZIP codes of Lamar County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Lamar County in numbers

About 19,571 people live in Lamar County, in 7,133 households, the 95th most populous of Georgia's 159 counties. The median household income is $67,062 a year, 13% below the Georgia median of $77,353 (US: $80,734). The median owner-occupied home is valued at $216,500 (29% below the Georgia median), and median gross rent is $878 a month. The median age is 39.2; 19.2% of adults 25 and over hold a bachelor's degree or higher (34.9% across Georgia); the average commute takes 32 minutes.

Population19,571Lamar19,571
Households7,133Lamar7,133
Median age39.2Lamar39.2Georgia37.6US 38.9
Median household income$67,062Lamar$67,062Georgia$77,353US $80,734
Median home value$216,500Lamar$216,500Georgia$303,300US $332,700
Median gross rent$878Lamar$878Georgia$1,393US $1,413
Bachelor's degree or higher19.2%Lamar19.2%Georgia34.9%US 35.7%
Mean commute31.8 minLamar31.8 minGeorgia28.3 minUS 26.4 min
Population density107 / sq miLamar107 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Lamar County

Largest towns in Lamar County
TownZIP codesPopulation
Barnesville 1 6,121
Milner 1 979

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Lamar County.

Not sure you are in Lamar County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Lamar County, with figures

ZIP codes in Lamar County
ZIP City Type Population Median income Median home
30204 Barnesville , GA Standard 13,616 $62,805 $188,900
30257 Milner , GA Standard 4,588 $67,941 $245,100

Cite this page

zipcodes.pro. “Lamar County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/ga/county/lamar

Underlying data is public domain or openly licensed — sources, vintages and licences.