Residential delivery area · Maine
ZIP Code 04358: South China, ME
ZIP code 04358 uses the postal name South China, Maine and lies entirely in Kennebec County (Census 2020 ZIP-county file). About 4,500 people live there (Census Bureau, ACS 2020-2024). Median household income is $96,309 (Census Bureau, ACS 2020-2024). Its land lies outside any incorporated or census-designated place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- South China · its only residential ZIP
- County
- Kennebec County
- Micro area
- Augusta-Waterville, ME
- House district
- ME-1 119th Congress
- State
- Maine
- Time zone
- Eastern
- Land area
- 49.8 sq mi · 91 people per sq mi
Where is ZIP code 04358?
04358 centers on 44.414°, -69.535° and covers 49.8 square miles of land plus 7.0 of water. It borders 6 ZIP codes: 04926, 04354, 04989, 04363, 04910, 04901.
The map draws ZIP code areas only. For the streets inside 04358, 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 04358 compare with the rest of Kennebec County?
| Measure | 04358 | In Kennebec County | In ME |
|---|---|---|---|
| People (ACS 2020-2024) | 4,526 | 7th of 27 | 83rd of 426 |
| Median household income | $96k | 1st of 17 | 33rd of 200 |
| Median home value | $240k | 15th of 22 | 149th of 242 |
Its median household income is higher than in 78% of U.S. residential ZIP codes, and it is denser than 52% 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 04358?
The 2020 Census counted 4,373 people in 04358; the ACS, which samples households over 2020-2024, estimates 4,526. Between the 2010 and 2020 censuses its population grew 2.3% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 4,526
- 2020 Census count
- 4,373+2.3% since 2010 (4,276)
- Households
- 1,895
- Median age
- 40.9
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 04358?
Of the 4,526 people the ACS estimates in 04358, 20.4% are under 18 and 21.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (93.7%).
- Under 1820.4%
- 18 to 6458.2%
- 65 and older21.4%
- White, not Hispanic93.7%
- Other or two or more3.8%
- Hispanic or Latino1.9%
- Asian, not Hispanic0.6%
- Black, not Hispanic0.0%
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 04358 earn?
Median household income is $96,309 (ACS 2020-2024), the highest of the 17 ranked ZIP codes in Kennebec County. It rose from $78,754 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $96,309±$12,098
- Income per person
- $45,079
- Below the poverty line
- 6.0%
- Unemployed (of the labor force)
- 2.1%
- Adults 25+ with a bachelor's degree
- 31.9%
- Adjusted gross income per tax return, 2022
- $67,5182,100 returns; wages 73% 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 04358?
FHFA's house price index for 04358, built from repeat sales and appraisals of the same homes, rose 151% from 2015 to 2025 and rose 91% from 2020 to 2025, and moved +11.6% in 2025.
- Median home value (owners' estimate)
- $240,000
- Median gross rent
- –
- Homes owned by their occupants
- 91.8%
- Housing units
- 2,539
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 04358?
81 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).
- Construction18
- Retail trade13
- Health care and social assistance7
- Administrative and support and waste management and remediation services6
- Accommodation and food services6
- Information5
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 04358?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 04926 | China Village | 0 | – | 4.7 mi |
| 04354 | Palermo | 1,473 | $89k | 5.3 mi |
| 04989 | Vassalboro | 4,592 | $72k | 5.7 mi |
| 04363 | Windsor | 2,690 | $63k | 7.1 mi |
| 04910 | Albion | 2,204 | $62k | 7.9 mi |
| 04901 | Waterville | 27,870 | $57k | 8.9 mi |
| 04949 | Liberty | 969 | $71k | 10.3 mi (near) |
| 04341 | Coopers Mills | 42 | – | 10.7 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.