Residential delivery area · Iowa
ZIP Code 51433: Auburn, IA
ZIP code 51433 uses the postal name Auburn, Iowa and lies mostly in Sac County (58% of its land) with the rest in Calhoun County (Census 2020 ZIP-county file). About 570 people live there (Census Bureau, ACS 2020-2024). Median household income is $68,125 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Auburn (under 1%) and Yetter (under 1%); 99% is outside any Census place.
- ACS2020-24
- Census2020
- ZBP2023
- IRS2022
- Town
- Auburn · its only residential ZIP
- County
- Sac County (58%); Calhoun County (42%)
- Census places
- Auburn (under 1%); Yetter (under 1%)
- House district
- IA-4 119th Congress
- State
- Iowa
- Time zone
- Central
- Land area
- 56.8 sq mi · 10 people per sq mi
Where is ZIP code 51433?
51433 centers on 42.267°, -94.875° and covers 56.8 square miles of land plus 0.4 of water. It borders 6 ZIP codes: 51449, 51450, 51436, 50561, 50583, 51401.
The map draws ZIP code areas only. For the streets inside 51433, 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 51433 compare with the rest of Sac County?
| Measure | 51433 | In Sac County | In IA |
|---|---|---|---|
| People (ACS 2020-2024) | 567 | 13th of 15 | 640th of 970 |
| Median household income | $68k | not ranked | not ranked |
| Median home value | $153k | not ranked | not ranked |
51433's income and home value are not ranked: it has fewer than 1,000 residents (567). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
It is denser than 17% of 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 51433?
The 2020 Census counted 643 people in 51433; the ACS, which samples households over 2020-2024, estimates 567. Between the 2010 and 2020 censuses its population fell 4.9% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 567±181 (90% margin)
- 2020 Census count
- 643−4.9% since 2010 (676)
- Households
- 227
- Median age
- 38.2
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 51433?
Of the 567 people the ACS estimates in 51433, 24.3% are under 18 and 15.5% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (98.4%).
- Under 1824.3%
- 18 to 6460.1%
- 65 and older15.5%
- White, not Hispanic98.4%
- Hispanic or Latino1.6%
- Black, not Hispanic0.0%
- Asian, not Hispanic0.0%
- Other or two or more0.0%
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 51433 earn?
Median household income is $68,125 (ACS 2020-2024). It is not measurably different from 2015-2019 ($64,815 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $68,125±$30,871
- Income per person
- $32,473
- Below the poverty line
- 20.8%
- Unemployed (of the labor force)
- 0.6%
- Adults 25+ with a bachelor's degree
- 11.8%
- Adjusted gross income per tax return, 2022
- $75,410290 returns; wages 54% 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 51433?
- Median home value (owners' estimate)
- $153,200
- Median gross rent
- $774
- Homes owned by their occupants
- 48.5%
- Housing units
- 244
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001).
What businesses are in 51433?
14 business establishments had a location in this ZIP code in 2023, the same count as in 2018; the most are in wholesale trade (ZIP Code Business Patterns).
- Wholesale trade3
- Transportation and warehousing3
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 51433?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 51449 | Lake City | 1,950 | $75k | 7.2 mi |
| 51450 | Lake View | 1,619 | $72k | 8.2 mi |
| 51436 | Breda | 815 | $62k | 8.5 mi |
| 50561 | Lytton | 585 | $67k | 10.5 mi |
| 50583 | Sac City | 2,288 | $63k | 12.8 mi |
| 51401 | Carroll | 11,990 | $71k | 13.9 mi |
| 51451 | Lanesboro | 74 | $44k | 10.8 mi (near) |
| 51452 | Lidderdale | 177 | $61k | 11.0 mi (near) |
| 51466 | Wall Lake | 1,043 | $72k | 11.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.