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County ZIP codes · Maine · FIPS 23023

Sagadahoc County, ME ZIP Codes

Sagadahoc County, Maine has 9 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 8 residential and 1 for PO boxes or a single organization. Median household income ranges from $65,854 in 04357 (Richmond) to $108,479 in 04008 (Bowdoinham) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Sagadahoc County?

04008 · Bowdoinham: $109k04086 · Topsham: $91k04287 · Bowdoin: $91k04357 · Richmond: $66k04530 · Bath: $80k04548 · Georgetown: $84k04562 · Phippsburg: $108k04579 · Woolwich: $102k045300456204008045790428704086045480435704008 · Bowdoinham: $109k04086 · Topsham: $91k04287 · Bowdoin: $91k04357 · Richmond: $66k04530 · Bath: $80k04548 · Georgetown: $84k04562 · Phippsburg: $108k04579 · Woolwich: $102k045300456204008045790428704086045480435704008 · Bowdoinham: $109k04086 · Topsham: $91k04287 · Bowdoin: $91k04357 · Richmond: $66k04530 · Bath: $80k04548 · Georgetown: $84k04562 · Phippsburg: $108k04579 · Woolwich: $102k0453004562040080457904287040860454804357
The residential ZIP codes of Sagadahoc 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?

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $79,649 and $91,239.

They carry 8 postal town names: Bath, Topsham, Richmond, Bowdoin, Woolwich, Bowdoinham, Phippsburg, Georgetown.

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

All 8 residential ZIP codes in Sagadahoc County

Residential ZIP codes mainly in Sagadahoc County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
04530 Bath 11,275 392 $80k $337k 100%
04086 Topsham 9,706 302 $91k $361k 100%
04357 Richmond 3,566 117 $66k $243k 100%
04287 Bowdoin 3,188 73 $91k $293k 100%
04579 Woolwich 3,158 90 $102k $255k 100%
04008 Bowdoinham 3,142 86 $109k $406k 100%
04562 Phippsburg 2,238 78 $108k $336k 100%
04548 Georgetown 1,012 54 $84k $427k 100%

Download the 9 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).

PO Box and single-organization ZIP codes

ZIP codes in Sagadahoc County without a residential area (GeoNames postal codes)
ZIPPostal name
04565Sebasco Estates

Source: GeoNames postal codes (CC BY 4.0).

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Sagadahoc County's ZIP codes use 4 prefixes: 040, 042, 043 and 045.

Three-digit prefixes of Sagadahoc 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 Sagadahoc County's
PrefixSectional centerHereAll codes
040 Southern, ME (SCF 040) 2 77
042 Southern, ME (SCF 040) 1 60
043 Southern, ME (SCF 040) 1 26
045 Southern, ME (SCF 040) 5 31

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