Residential delivery area · Iowa
ZIP Code 51023: Hawarden, IA
ZIP code 51023 uses the postal name Hawarden, Iowa and lies mostly in Sioux County (70% of its land) with the rest in Union County (Census 2020 ZIP-county file). About 3,500 people live there (Census Bureau, ACS 2020-2024). Median household income is $80,357 (Census Bureau, ACS 2020-2024). By Census place, 2% of its land lies in Hawarden; 98% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Hawarden · its only residential ZIP
- County
- Sioux County (70%); Union County (30%)
- Census places
- Hawarden
- House districts
- IA-4 (70%), SD at large (30%) 119th Congress, by share of land
- State
- Iowa
- Time zone
- Central
- Land area
- 119.9 sq mi · 29 people per sq mi
Where is ZIP code 51023?
51023 centers on 43.007°, -96.463° and covers 119.9 square miles of land plus 0.8 of water. It borders 7 ZIP codes: 51011, 51027, 57034, 57001, 51001, 51250, 51247.
The map draws ZIP code areas only. For the streets inside 51023, 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 51023 compare with the rest of Sioux County?
| Measure | 51023 | In Sioux County | In IA |
|---|---|---|---|
| People (ACS 2020-2024) | 3,473 | 6th of 19 | 180th of 970 |
| Median household income | $80k | 8th of 12 | 168th of 396 |
| Median home value | $173k | 14th of 14 | 247th of 423 |
Its median household income is higher than in 62% of U.S. residential ZIP codes, and it is denser than 32% 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 51023?
The 2020 Census counted 3,392 people in 51023; the ACS, which samples households over 2020-2024, estimates 3,473. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 3,473
- 2020 Census count
- 3,392
- Households
- 1,236
- Median age
- 36.9
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 51023?
Of the 3,473 people the ACS estimates in 51023, 28.8% are under 18 and 16.3% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (71.7%), then Hispanic or Latino (27.8%).
- Under 1828.8%
- 18 to 6454.9%
- 65 and older16.3%
- White, not Hispanic71.7%
- Hispanic or Latino27.8%
- Other or two or more0.5%
- Black, not Hispanic0.0%
- Asian, not Hispanic0.0%
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 51023 earn?
Median household income is $80,357 (ACS 2020-2024), the 8th highest of the 12 ranked ZIP codes in Sioux County.
- Median household income
- $80,357±$13,396
- Income per person
- $37,539
- Below the poverty line
- 7.1%
- Unemployed (of the labor force)
- 1.3%
- Adults 25+ with a bachelor's degree
- 21.3%
- Adjusted gross income per tax return, 2022
- $65,0041,350 returns; wages 68% 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 51023?
FHFA's house price index for 51023, built from repeat sales and appraisals of the same homes, rose 103% from 2015 to 2025 and rose 59% from 2020 to 2025, and moved +15.4% in 2025.
- Median home value (owners' estimate)
- $173,300
- Median gross rent
- $926
- Homes owned by their occupants
- 70.9%
- Housing units
- 1,347
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 51023?
88 business establishments had a location in this ZIP code in 2023, 8 fewer than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade19
- Health care and social assistance12
- Other services (except public administration)12
- Accommodation and food services8
- Construction6
- Manufacturing6
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 51023?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 51011 | Chatsworth | 54 | $44k | 6.8 mi |
| 51027 | Ireton | 1,280 | $101k | 7.4 mi |
| 57034 | Hudson, SD | 661 | $90k | 8.7 mi |
| 57001 | Alcester, SD | 1,540 | $70k | 9.8 mi |
| 51001 | Akron | 2,342 | $75k | 12.2 mi |
| 51250 | Sioux Center | 9,970 | $94k | 14.3 mi |
| 51247 | Rock Valley | 5,094 | $78k | 14.4 mi |
| 57027 | Fairview, SD | 199 | – | 13.1 mi (near) |
| 51036 | Maurice | 445 | $123k | 14.1 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.