Residential delivery area · Minnesota
ZIP Code 55920: Byron, MN
ZIP code 55920 uses the postal name Byron, Minnesota and lies entirely in Olmsted County (Census 2020 ZIP-county file). About 9,300 people live there (Census Bureau, ACS 2020-2024). Median household income is $131,336 (Census Bureau, ACS 2020-2024). By Census place, 4% of its land lies in Byron; 96% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Byron · its only residential ZIP
- County
- Olmsted County
- Census places
- Byron
- Metro area
- Rochester, MN
- House district
- MN-1 119th Congress
- State
- Minnesota
- Time zone
- Central
- Land area
- 68.7 sq mi · 135 people per sq mi
Where is ZIP code 55920?
55920 centers on 44.012°, -92.621° and covers 68.7 square miles of land. It borders 8 ZIP codes: 55944, 55902, 55901, 55955, 55960, 55963, 55940, 55976.
The map draws ZIP code areas only. For the streets inside 55920, 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 55920 compare with the rest of Olmsted County?
| Measure | 55920 | In Olmsted County | In MN |
|---|---|---|---|
| People (ACS 2020-2024) | 9,271 | 5th of 20 | 179th of 881 |
| Median household income | $131k | 2nd of 18 | 34th of 545 |
| Median home value | $373k | 6th of 18 | 107th of 558 |
Its median household income is higher than in 93% of U.S. residential ZIP codes, and it is denser than 58% 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 55920?
The 2020 Census counted 8,512 people in 55920; the ACS, which samples households over 2020-2024, estimates 9,271. Between the 2010 and 2020 censuses its population grew 21.2% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 9,271
- 2020 Census count
- 8,512+21.2% since 2010 (7,026)
- Households
- 3,270
- Median age
- 38.4
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 55920?
Of the 9,271 people the ACS estimates in 55920, 30.8% are under 18 and 14.2% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (90.4%).
- Under 1830.8%
- 18 to 6455.1%
- 65 and older14.2%
- White, not Hispanic90.4%
- Other or two or more3.7%
- Asian, not Hispanic2.4%
- Hispanic or Latino2.4%
- Black, not Hispanic1.1%
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 55920 earn?
Median household income is $131,336 (ACS 2020-2024), the 2nd highest of the 18 ranked ZIP codes in Olmsted County. It is not measurably different from 2015-2019 ($116,316 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $131,336±$14,140
- Income per person
- $50,715
- Below the poverty line
- 3.7%
- Unemployed (of the labor force)
- 3.5%
- Adults 25+ with a bachelor's degree
- 47.1%
- Adjusted gross income per tax return, 2022
- $103,8824,400 returns; wages 75% 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 55920?
FHFA's house price index for 55920, built from repeat sales and appraisals of the same homes, rose 74% from 2015 to 2025 and rose 37% from 2020 to 2025, and moved +2.9% in 2025.
- Median home value (owners' estimate)
- $372,600
- Median gross rent
- $1,138
- Homes owned by their occupants
- 85.6%
- Housing units
- 3,354
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 55920?
166 business establishments had a location in this ZIP code in 2023, 8 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction39
- Other services (except public administration)21
- Retail trade15
- Health care and social assistance15
- Professional, scientific, and technical services14
- Accommodation and food services12
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 55920?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 55944 | Kasson | 8,161 | $95k | 5.1 mi |
| 55902 | Rochester | 26,464 | $121k | 6.3 mi |
| 55901 | Rochester | 58,495 | $95k | 7.6 mi |
| 55955 | Mantorville | 2,605 | $133k | 7.9 mi |
| 55960 | Oronoco | 3,375 | $130k | 9.8 mi |
| 55963 | Pine Island | 5,244 | $112k | 11.9 mi |
| 55940 | Hayfield | 2,791 | $84k | 12.2 mi |
| 55976 | Stewartville | 8,509 | $87k | 12.3 mi |
| 55905 | Rochester | 0 | – | 5.6 mi (near) |
| 55903 | Rochester | 0 | – | 9.2 mi (near) |
| 55904 | Rochester | 29,639 | $77k | 11.7 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.