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US ZIP Code Profile

ZIP Code 55121
Saint Paul, Minnesota

ZIP code 55121 is in Saint Paul, located in Dakota County, Minnesota, within the Minneapolis-St. Paul-Bloomington metro area. Its 2020 Census population was 9,468. The estimated median adjusted gross income per tax return is $55,455, and about 5% of filers report $200,000 or more.

2020 Population
9,468
Census ZCTA
County
Dakota
FIPS 27037
Median income (est.)
$55,455
IRS SOI 2022
Land Area
9.032 mi²
+ 0.754 mi² water

01Location & Geography

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

Primary CitySaint Paul, MN
CountyDakota County (FIPS 27037)
StateMinnesota (FIPS 27)
Metro Area (MSA)Minneapolis-St. Paul-Bloomington, MN-WI Metro Area (33460)
Census Region / DivisionMidwest Region · West North Central Division
Coordinates44.846542, -93.15494
Land / Water Area9.032 mi² land · 0.754 mi² water

02Income & Economics

Distribution of the 5,420 individual tax returns filed in 55121 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
20.3%
$25K–$50K
25.3%
$50K–$75K
20.3%
$75K–$100K
12.4%
$100K–$200K
16.6%
$200K+
5.2%
The $200,000+ bracket accounts for 30% of 55121's total adjusted gross income, from 5% of returns — a concentration that drives the gap between the median ($55,455) 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 55121's IRS income metrics, 2020–2022.

Median income (2021→2022)
$55,455
▲ 6.8%
Filers earning $200K+
5.2%
▼ 0.1 pt
Total filers
5,420
▲ 1.1%
GET /zipc/v2/zipcodes/55121/soi?year=… $48K 2020 $52K 2021 $55K 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 55121 ZCTA.

2000
7,714
 
2010
7,861
▲ +1.9%
2020
9,468
▲ +20.4%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 55121. Powered by the same radius endpoint developers call from the API.

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ZIP codes within range of 55121

Saint Paul and its immediate neighbors, sorted by distance.

3.0 mi
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Distance from 55121 to any ZIP

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06USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortB
USPS Finance Number268360
City AliasesEagan, Saint Paul

07Frequently Asked Questions

What county is ZIP code 55121 in?

ZIP code 55121 is in Dakota County, Minnesota (county FIPS code 27037).

What city is ZIP code 55121?

The primary USPS city for 55121 is Saint Paul, MN.

What metro area (MSA) is 55121 in?

55121 is part of the Minneapolis-St. Paul-Bloomington, MN-WI Metro Area (MSA code 33460).

What is the population of ZIP code 55121?

The 2020 Census population of 55121 was 9,468 residents.

What is the median income in ZIP code 55121?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 55121 is about $55,455, with around 5% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.