Residential delivery area · Minnesota
ZIP Code 56431: Aitkin, MN
ZIP code 56431 uses the postal name Aitkin, Minnesota and lies mostly in Aitkin County (85% of its land) with the rest in Crow Wing County (Census 2020 ZIP-county file). About 9,300 people live there (Census Bureau, ACS 2020-2024). Median household income is $67,828 (Census Bureau, ACS 2020-2024). By Census place, under 1% of its land lies in Aitkin; more than 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Aitkin · its only residential ZIP
- County
- Aitkin County (85%); Crow Wing County (15%)
- Census places
- Aitkin
- House district
- MN-8 119th Congress
- State
- Minnesota
- Time zone
- Central
- Land area
- 462.8 sq mi · 20 people per sq mi
Where is ZIP code 56431?
56431 centers on 46.491°, -93.636° and covers 462.8 square miles of land plus 127.6 of water. It borders 10 ZIP codes: 56444, 56441, 56450, 56469, 56447, 55760, 56350, 56342, 56401, 56359.
The map draws ZIP code areas only. For the streets inside 56431, 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 56431 compare with the rest of Aitkin County?
| Measure | 56431 | In Aitkin County | In MN |
|---|---|---|---|
| People (ACS 2020-2024) | 9,312 | 1st of 12 | 178th of 881 |
| Median household income | $68k | 2nd of 6 | 433rd of 545 |
| Median home value | $295k | 1st of 6 | 233rd of 558 |
Its median household income is higher than in 43% of U.S. residential ZIP codes, and it is denser than 26% 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 56431?
The 2020 Census counted 8,763 people in 56431; the ACS, which samples households over 2020-2024, estimates 9,312. Between the 2010 and 2020 censuses its population fell 1.9% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 9,312
- 2020 Census count
- 8,763−1.9% since 2010 (8,931)
- Households
- 4,099
- Median age
- 56.6
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 56431?
Of the 9,312 people the ACS estimates in 56431, 16.2% are under 18 and 34.7% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (94.5%).
- Under 1816.2%
- 18 to 6449.1%
- 65 and older34.7%
- White, not Hispanic94.5%
- Other or two or more3.5%
- Hispanic or Latino1.2%
- Black, not Hispanic0.5%
- Asian, not Hispanic0.2%
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 56431 earn?
Median household income is $67,828 (ACS 2020-2024), the 2nd highest of the 6 ranked ZIP codes in Aitkin County. It rose from $62,354 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $67,828
- Income per person
- $39,048
- Below the poverty line
- 12.4%
- Unemployed (of the labor force)
- 4.3%
- Adults 25+ with a bachelor's degree
- 23.2%
- Adjusted gross income per tax return, 2022
- $70,3764,430 returns; wages 56% 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 56431?
FHFA's house price index for 56431, built from repeat sales and appraisals of the same homes, rose 88% from 2015 to 2025 and rose 57% from 2020 to 2025, and moved +1.2% in 2025.
- Median home value (owners' estimate)
- $295,400
- Median gross rent
- $829
- Homes owned by their occupants
- 85.5%
- Housing units
- 7,068
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 56431?
258 business establishments had a location in this ZIP code in 2023, 3 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction50
- Retail trade43
- Health care and social assistance31
- Other services (except public administration)28
- Accommodation and food services21
- Manufacturing15
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 56431?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 56444 | Deerwood | 3,331 | $78k | 12.6 mi |
| 56441 | Crosby | 3,348 | $50k | 17.5 mi |
| 56450 | Garrison | 983 | $61k | 20.2 mi |
| 56469 | Palisade | 967 | $66k | 20.3 mi |
| 56447 | Emily | 843 | $65k | 20.4 mi |
| 55760 | McGregor | 2,894 | $60k | 20.8 mi |
| 56350 | McGrath | 471 | $42k | 23.2 mi |
| 56342 | Isle | 2,788 | $63k | 24.7 mi |
| 56401 | Brainerd | 31,841 | $73k | 26.1 mi |
| 56359 | Onamia | 3,521 | $60k | 27.1 mi |
| 56455 | Ironton | 1,688 | $73k | 17.7 mi (near) |
| 56465 | Merrifield | 2,476 | $74k | 23.0 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.