Residential delivery area · Minnesota
ZIP Code 55121: Saint Paul, MN
ZIP code 55121 uses the postal name Saint Paul, Minnesota and lies entirely in Dakota County (Census 2020 ZIP-county file). About 9,200 people live there (Census Bureau, ACS 2020-2024), the 25th most populous of Saint Paul's 31 residential ZIP codes. Median household income is $87,152 (Census Bureau, ACS 2020-2024). Most of its land (100%) lies in the city of Eagan.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Saint Paul · 31 residential ZIPs
- County
- Dakota County
- Census places
- Eagan
- Metro area
- Minneapolis-St. Paul-Bloomington, MN-WI
- House district
- MN-2 119th Congress
- State
- Minnesota
- Time zone
- Central
- Land area
- 9.6 sq mi · 957 people per sq mi
- PO Box ZIPs
- 12 more ZIP codes use the name Saint Paul for PO boxes or single organizations
Where is ZIP code 55121?
55121 centers on 44.846°, -93.160° and covers 9.6 square miles of land plus 0.9 of water. It borders 6 ZIP codes: 55120, 55123, 55425, 55122, 55077, 55337.
The map draws ZIP code areas only. For the streets inside 55121, 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 55121 compare with the rest of Saint Paul?
| Measure | 55121 | In Saint Paul | In Dakota County | In MN |
|---|---|---|---|---|
| People (ACS 2020-2024) | 9,198 | 25th of 31 | 15th of 22 | 181st of 881 |
| Median household income | $87k | 15th of 29 | 19th of 20 | 213th of 545 |
| Median home value | $301k | 21st of 29 | 19th of 20 | 223rd of 558 |
Its median household income is higher than in 70% of U.S. residential ZIP codes, and it is denser than 78% 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 55121?
The 2020 Census counted 9,468 people in 55121; the ACS, which samples households over 2020-2024, estimates 9,198. Between the 2010 and 2020 censuses its population grew 20.4% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 9,198
- 2020 Census count
- 9,468+20.4% since 2010 (7,861)
- Households
- 4,199
- Median age
- 37.2
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 55121?
Of the 9,198 people the ACS estimates in 55121, 19.9% are under 18 and 15.3% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (60.4%), then Black (not Hispanic) (20.0%).
- Under 1819.9%
- 18 to 6464.8%
- 65 and older15.3%
- White, not Hispanic60.4%
- Black, not Hispanic20.0%
- Other or two or more7.3%
- Hispanic or Latino6.2%
- Asian, not Hispanic6.1%
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 55121 earn?
Median household income is $87,152 (ACS 2020-2024), the 19th highest of the 20 ranked ZIP codes in Dakota County. It is not measurably different from 2015-2019 ($82,515 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $87,152
- Income per person
- $51,298
- Below the poverty line
- 6.0%
- Unemployed (of the labor force)
- 2.0%
- Adults 25+ with a bachelor's degree
- 44.4%
- Adjusted gross income per tax return, 2022
- $82,4115,420 returns; wages 69% 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 55121?
FHFA's house price index for 55121, built from repeat sales and appraisals of the same homes, rose 57% from 2015 to 2025 and rose 27% from 2020 to 2025, and moved −0.2% in 2025.
- Median home value (owners' estimate)
- $301,400
- Median gross rent
- $1,723
- Homes owned by their occupants
- 41.1%
- Housing units
- 4,397
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 55121?
852 business establishments had a location in this ZIP code in 2023, 27 fewer than in 2018; the most are in wholesale trade (ZIP Code Business Patterns).
- Wholesale trade110
- Transportation and warehousing95
- Professional, scientific, and technical services76
- Health care and social assistance67
- Retail trade66
- Manufacturing64
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 55121?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 55120 | Saint Paul | 5,058 | $116k | 2.1 mi |
| 55123 | Saint Paul | 26,501 | $139k | 3.2 mi |
| 55425 | Minneapolis | 10,908 | $76k | 3.3 mi |
| 55122 | Saint Paul | 32,261 | $97k | 3.6 mi |
| 55077 | Inver Grove Heights | 14,503 | $112k | 4.5 mi |
| 55337 | Burnsville | 47,633 | $84k | 7.2 mi |
| 55150 | Mendota | 201 | $111k | 2.9 mi (near) |
| 55111 | Saint Paul | 233 | – | 3.4 mi (near) |
| 55450 | Minneapolis | 124 | – | 3.9 mi (near) |
| 55118 | Saint Paul | 29,564 | $87k | 4.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.