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US ZIP Code Profile

ZIP Code 04106
South Portland, Maine

ZIP code 04106 is in South Portland, located in Cumberland County, Maine, within the Portland-South Portland metro area. Its 2020 Census population was 26,641. The estimated median adjusted gross income per tax return is $53,056, and about 6% of filers report $200,000 or more.

2020 Population
26,641
Census ZCTA
County
Cumberland
FIPS 23005
Median income (est.)
$53,056
IRS SOI 2022
Land Area
12.295 mi²
+ 1.945 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CitySouth Portland, ME
CountyCumberland County (FIPS 23005)
StateMaine (FIPS 23)
Metro Area (MSA)Portland-South Portland, ME Metro Area (38860)
Census Region / DivisionNortheast Region · New England Division
Coordinates43.6314, -70.28599
Land / Water Area12.295 mi² land · 1.945 mi² water

02Income & Economics

Distribution of the 14,980 individual tax returns filed in 04106 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
23.8%
$25K–$50K
24.0%
$50K–$75K
18.0%
$75K–$100K
10.8%
$100K–$200K
17.6%
$200K+
5.9%
The $200,000+ bracket accounts for 28% of 04106's total adjusted gross income, from 6% of returns — a concentration that drives the gap between the median ($53,056) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 04106's IRS income metrics, 2020–2022.

Median income (2021→2022)
$53,056
▲ 7.4%
Filers earning $200K+
5.9%
▲ 0.3 pt
Total filers
14,980
▲ 0.1%
GET /zipc/v2/zipcodes/04106/soi?year=… $46K 2020 $49K 2021 $53K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 04106 ZCTA.

2000
23,473
 
2010
25,175
▲ +7.3%
2020
26,641
▲ +5.8%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 04106. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 04106

South Portland and its immediate neighbors, sorted by distance.

3 mi
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Distance from 04106 to any ZIP

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06USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypeBranch
Carrier Route SortD
USPS Finance Number226900
City AliasesPortland, So Portland, South Portland, S Portland

07Frequently Asked Questions

What county is ZIP code 04106 in?

ZIP code 04106 is in Cumberland County, Maine (county FIPS code 23005).

What city is ZIP code 04106?

The primary USPS city for 04106 is South Portland, ME.

What metro area (MSA) is 04106 in?

04106 is part of the Portland-South Portland, ME Metro Area (MSA code 38860).

What is the population of ZIP code 04106?

The 2020 Census population of 04106 was 26,641 residents.

What is the median income in ZIP code 04106?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 04106 is about $53,056, with around 6% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.