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US ZIP Code Profile

ZIP Code 04101
Portland, Maine

ZIP code 04101 is in Portland, located in Cumberland County, Maine, within the Portland-South Portland metro area. Its 2020 Census population was 18,109. The estimated median adjusted gross income per tax return is $47,337, and about 7% of filers report $200,000 or more.

2020 Population
18,109
Census ZCTA
County
Cumberland
FIPS 23005
Median income (est.)
$47,337
IRS SOI 2022
Land Area
2.004 mi²
+ 0.902 mi² water

01Location & Geography

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

Primary CityPortland, 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
Coordinates43.662605, -70.25795
Land / Water Area2.004 mi² land · 0.902 mi² water

02Income & Economics

Distribution of the 10,120 individual tax returns filed in 04101 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
24.3%
$25K–$50K
28.7%
$50K–$75K
19.1%
$75K–$100K
9.3%
$100K–$200K
11.6%
$200K+
7.0%
The $200,000+ bracket accounts for 45% of 04101's total adjusted gross income, from 7% of returns — a concentration that drives the gap between the median ($47,337) 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 04101's IRS income metrics, 2020–2022.

Median income (2021→2022)
$47,337
▲ 9.1%
Filers earning $200K+
7.0%
▲ 0.2 pt
Total filers
10,120
▲ 1.3%
GET /zipc/v2/zipcodes/04101/soi?year=… $39K 2020 $43K 2021 $47K 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 04101 ZCTA.

2000
17,446
 
2010
17,227
▼ -1.3%
2020
18,109
▲ +5.1%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 04101. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 04101

Portland and its immediate neighbors, sorted by distance.

3 mi
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Distance from 04101 to any ZIP

Enter a 5-digit ZIP to calculate the distance.

06USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number226900
City AliasesPortland

07Frequently Asked Questions

What county is ZIP code 04101 in?

ZIP code 04101 is in Cumberland County, Maine (county FIPS code 23005).

What city is ZIP code 04101?

The primary USPS city for 04101 is Portland, ME.

What metro area (MSA) is 04101 in?

04101 is part of the Portland-South Portland, ME Metro Area (MSA code 38860).

What is the population of ZIP code 04101?

The 2020 Census population of 04101 was 18,109 residents.

What is the median income in ZIP code 04101?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 04101 is about $47,337, with around 7% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.