Plain

County ZIP codes · Georgia · FIPS 13141

Hancock County, GA ZIP Codes

Hancock County, Georgia has 5 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 2 of the residential ones lie mainly in Hancock County and 3 mainly in a neighboring county; 5 cross the county line. Median household income ranges from $37,679 in 31087 (Sparta) to $54,263 in 31061 (Milledgeville) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Hancock County?

30678 · White Plains: $49k30820 · Mitchell: $51k31045 · Jewell: –31061 · Milledgeville: $54k31087 · Sparta: $38k310873106130820306783104530678 · White Plains: $49k30820 · Mitchell: $51k31045 · Jewell: –31061 · Milledgeville: $54k31087 · Sparta: $38k310873106130820306783104530678 · White Plains: $49k30820 · Mitchell: $51k31045 · Jewell: –31061 · Milledgeville: $54k31087 · Sparta: $38k31087310613082030678
The residential ZIP codes of Hancock County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

They carry 5 postal town names: Milledgeville, Sparta, White Plains, Mitchell, Jewell.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 5 residential ZIP codes in Hancock County

2 ZIP codes lie mainly in Hancock County; 3 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Hancock County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
31087 Sparta 8,846 20 $38k $88k 98%
31045 Jewell 42 5 – – 76%

Partly in Hancock County

Residential ZIP codes mainly in another county that reach at least 1% into Hancock County, by their share here
In this county
30678 White Plains 1,271 18 $49k $173k 22%
30820 Mitchell 1,104 12 $51k $83k 12%
31061 Milledgeville 41,764 153 $54k $184k 3%

Download the 5 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

5 ZIP codes of Hancock County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Hancock County and in the neighboring counties
ZIPIn HancockElsewhere
310613%Baldwin County 81%; Wilkinson County 15%; Putnam County 1%
3108798%Baldwin County 2%
3067822%Greene County 74%; Taliaferro County 4%
3082012%Glascock County 54%; Warren County 17%; Washington County 16%
3104576%Warren County 24%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do Hancock County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Hancock County's ZIP codes use 3 prefixes: 306, 308 and 310.

Three-digit prefixes of Hancock County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Hancock County's
PrefixSectional centerHereAll codes
306 North Metro, GA (SCF 300) 1 52
308 Augusta, GA (SCF 308) 1 25
310 Macon, GA (SCF 310) 3 92

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.