Residential delivery area · Maine
ZIP Code 04345: Gardiner, ME
ZIP code 04345 uses the postal name Gardiner, Maine and lies entirely in Kennebec County (Census 2020 ZIP-county file). About 13,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $77,410 (Census Bureau, ACS 2020-2024). By Census place, 21% of its land lies in Gardiner; 79% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Gardiner · its only residential ZIP
- County
- Kennebec County
- Census places
- Gardiner
- Micro area
- Augusta-Waterville, ME
- House districts
- ME-1 (79%), ME-2 (21%) 119th Congress, by share of land
- State
- Maine
- Time zone
- Eastern
- Land area
- 71.7 sq mi · 175 people per sq mi
Where is ZIP code 04345?
04345 centers on 44.195°, -69.794° and covers 71.7 square miles of land plus 4.6 of water. It borders 12 ZIP codes: 04359, 04346, 04344, 04357, 04350, 04342, 04353, 04535, 04351, 04330 and more.
The map draws ZIP code areas only. For the streets inside 04345, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 04345 compare with the rest of Kennebec County?
| Measure | 04345 | In Kennebec County | In ME |
|---|---|---|---|
| People (ACS 2020-2024) | 12,579 | 3rd of 27 | 20th of 426 |
| Median household income | $77k | 8th of 17 | 83rd of 200 |
| Median home value | $243k | 14th of 22 | 142nd of 242 |
Its median household income is higher than in 58% of U.S. residential ZIP codes, and it is denser than 61% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 04345?
The 2020 Census counted 12,052 people in 04345; the ACS, which samples households over 2020-2024, estimates 12,579. Between the 2010 and 2020 censuses its population grew 3.5% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 12,579
- 2020 Census count
- 12,052+3.5% since 2010 (11,646)
- Households
- 5,083
- Median age
- 41.9
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 04345?
Of the 12,579 people the ACS estimates in 04345, 17.8% are under 18 and 19.1% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (89.7%).
- Under 1817.8%
- 18 to 6463.1%
- 65 and older19.1%
- White, not Hispanic89.7%
- Hispanic or Latino4.7%
- Other or two or more4.1%
- Asian, not Hispanic0.8%
- Black, not Hispanic0.7%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 04345 earn?
Median household income is $77,410 (ACS 2020-2024), the 8th highest of the 17 ranked ZIP codes in Kennebec County. It is not measurably different from 2015-2019 ($67,513 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $77,410±$13,534
- Income per person
- $40,192
- Below the poverty line
- 10.2%
- Unemployed (of the labor force)
- 4.5%
- Adults 25+ with a bachelor's degree
- 29.7%
- Adjusted gross income per tax return, 2022
- $64,8276,300 returns; wages 74% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 04345?
FHFA's house price index for 04345, built from repeat sales and appraisals of the same homes, rose 118% from 2015 to 2025 and rose 70% from 2020 to 2025, and moved +7.2% in 2025.
- Median home value (owners' estimate)
- $242,800
- Median gross rent
- $1,045
- Homes owned by their occupants
- 77.6%
- Housing units
- 5,538
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 04345?
236 business establishments had a location in this ZIP code in 2023, 5 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction52
- Retail trade31
- Other services (except public administration)28
- Professional, scientific, and technical services26
- Accommodation and food services17
- Health care and social assistance16
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 04345?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 04359 | South Gardiner | 298 | – | 1.9 mi |
| 04346 | Randolph | 1,610 | $67k | 3.6 mi |
| 04344 | Farmingdale | 3,017 | $72k | 4.8 mi |
| 04357 | Richmond | 3,566 | $66k | 5.7 mi |
| 04350 | Litchfield | 3,680 | $85k | 7.2 mi |
| 04342 | Dresden | 1,645 | $75k | 8.0 mi |
| 04353 | Whitefield | 2,115 | $74k | 8.6 mi |
| 04535 | Alna | 818 | $93k | 10.5 mi |
| 04351 | Manchester | 2,424 | $92k | 10.7 mi |
| 04330 | Augusta | 26,690 | $55k | 11.1 mi |
| 04259 | Monmouth | 3,610 | $84k | 11.3 mi |
| 04364 | Winthrop | 6,191 | $87k | 11.5 mi |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.