Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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zipcodes.pro — STATE/ME/COUNTY/KENNEBEC

Kennebec County, ME ZIP codes

There are 34 ZIP codes in Kennebec County, ME, in 29 towns, from 04259 to 04989. The largest are 04330 (Augusta), 04901 (Waterville) and 04345 (Gardiner).

The county seat is Augusta.

ZIP codes
34
Towns
29
County seat
Augusta
County FIPS
23011
State
Maine
Population
126,808
Median household income
$69,077
Land area
867 sq mi
Area code
207

Kennebec County ZIP codes by town

Augusta (county seat)
04330, 04332, 04333, 04336, 04338

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 Kennebec County ZIP codes

04259042650428404330043320433304336043380434304344043450434604347043490435004351043520435504358043590436004363043640490104903049100491704918049260492704935049620496304989

The ZIP codes of Kennebec 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.

Kennebec County in numbers

About 126,808 people live in Kennebec County, in 54,312 households, the 4th most populous of Maine's 16 counties. The median household income is $69,077 a year, 8% below the Maine median of $74,733 (US: $80,734). The median owner-occupied home is valued at $238,200 (20% below the Maine median), and median gross rent is $992 a month. The median age is 43.7; 31.9% of adults 25 and over hold a bachelor's degree or higher (36.2% across Maine); the average commute takes 25 minutes.

Population126,808Kennebec126,808
Households54,312Kennebec54,312
Median age43.7Kennebec43.7Maine44.8US 38.9
Median household income$69,077Kennebec$69,077Maine$74,733US $80,734
Median home value$238,200Kennebec$238,200Maine$296,600US $332,700
Median gross rent$992Kennebec$992Maine$1,139US $1,413
Bachelor's degree or higher31.9%Kennebec31.9%Maine36.2%US 35.7%
Mean commute25.4 minKennebec25.4 minMaine24.6 minUS 26.4 min
Population density146 / sq miKennebec146 / 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 Kennebec County

Largest towns in Kennebec County
TownZIP codesPopulation
Augusta 5 19,077
Waterville 2 17,077
Gardiner 1 6,088
Vassalboro 1 4,592
South China 1 4,526
Litchfield 1 3,680
Monmouth 1 3,610
Belgrade 1 3,351
Winthrop 1 3,108
Oakland 1 2,710
Windsor 1 2,690
Readfield 1 2,651
Hallowell 1 2,592
Manchester 1 2,424
Albion 1 2,204

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 Kennebec County.

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

Every ZIP code in Kennebec County, with figures

ZIP codes in Kennebec County
ZIP City Type Population Median income Median home
04259 Monmouth , ME Standard 3,610 $83,919 $298,300
04265 North Monmouth , ME Standard 552 $43,506 $169,900
04284 Wayne , ME Standard 1,101 $93,194 $362,800
04330 Augusta , ME Standard 26,690 $54,775 $217,300
04332 Augusta , ME No street area — — —
04333 Augusta , ME No street area — — —
04336 Augusta , ME No street area — — —
04338 Augusta , ME No street area — — —
04343 East Winthrop , ME No street area — — —
04344 Farmingdale , ME Standard 3,017 $71,635 $249,700
04345 Gardiner , ME Standard 12,579 $77,410 $242,800
04346 Randolph , ME Standard 1,610 $66,574 $174,300
04347 Hallowell , ME Standard 2,592 $68,398 $295,300
04349 Kents Hill , ME Standard 1,383 $59,500 $257,600
04350 Litchfield , ME Standard 3,680 $84,904 $243,900
04351 Manchester , ME Standard 2,424 $92,031 $299,600
04352 Mount Vernon , ME Standard 1,716 $74,395 $264,200
04355 Readfield , ME Standard 2,651 $86,504 $326,400
04358 South China , ME Standard 4,526 $96,309 $240,000
04359 South Gardiner , ME Standard 298 — $186,700
04360 Vienna , ME Standard 536 $75,481 $276,400
04363 Windsor , ME Standard 2,690 $63,178 $228,800
04364 Winthrop , ME Standard 6,191 $86,470 $294,800
04901 Waterville , ME Standard 27,870 $57,403 $204,700
04903 Waterville , ME No street area — — —
04910 Albion , ME Standard 2,204 $62,361 $230,900
04917 Belgrade , ME Standard 3,351 $88,338 $312,200
04918 Belgrade Lakes , ME Standard 0 — —
04926 China Village , ME Standard 0 — —
04927 Clinton , ME Standard 3,385 $71,458 $187,000
04935 East Vassalboro , ME No street area — — —
04962 North Vassalboro , ME No street area — — —
04963 Oakland , ME Standard 7,524 $77,708 $247,200
04989 Vassalboro , ME Standard 4,592 $72,300 $244,300

Cite this page

zipcodes.pro. “Kennebec County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/me/county/kennebec

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