Residential delivery area · Iowa
ZIP Code 52078: Worthington, IA
ZIP code 52078 uses the postal name Worthington, Iowa and lies mostly in Dubuque County (64% of its land) with the rest in Delaware County (Census 2020 ZIP-county file). About 870 people live there (Census Bureau, ACS 2020-2024). Median household income is $97,778 (Census Bureau, ACS 2020-2024). By Census place, 1% of its land lies in Worthington; 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2021
- ZBP2023
- IRS2022
- Town
- Worthington · its only residential ZIP
- County
- Dubuque County (64%); Delaware County (36%)
- Census places
- Worthington
- Metro area
- Dubuque, IA
- House district
- IA-2 119th Congress
- State
- Iowa
- Time zone
- Central
- Land area
- 41.5 sq mi · 21 people per sq mi
Where is ZIP code 52078?
52078 centers on 42.396°, -91.116° and covers 41.5 square miles of land plus 0.0 of water. It borders 5 ZIP codes: 52046, 52040, 52237, 52033, 52041.
The map draws ZIP code areas only. For the streets inside 52078, 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 52078 compare with the rest of Dubuque County?
| Measure | 52078 | In Dubuque County | In IA |
|---|---|---|---|
| People (ACS 2020-2024) | 870 | 17th of 20 | 509th of 970 |
| Median household income | $98k | not ranked | not ranked |
| Median home value | $238k | not ranked | not ranked |
52078's income and home value are not ranked: it has fewer than 1,000 residents (870). 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 27% 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 52078?
The 2020 Census counted 847 people in 52078; the ACS, which samples households over 2020-2024, estimates 870. Between the 2010 and 2020 censuses its population fell 7.3% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 870±246 (90% margin)
- 2020 Census count
- 847−7.3% since 2010 (914)
- Households
- 322
- Median age
- 40.4
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 52078?
Of the 870 people the ACS estimates in 52078, 25.3% are under 18 and 12.6% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (97.0%).
- Under 1825.3%
- 18 to 6462.1%
- 65 and older12.6%
- White, not Hispanic97.0%
- Other or two or more3.0%
- Hispanic or Latino0.0%
- 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 52078 earn?
Median household income is $97,778 (ACS 2020-2024). It is not measurably different from 2015-2019 ($82,641 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $97,778±$18,845
- Income per person
- $35,127
- Below the poverty line
- 1.7%
- Unemployed (of the labor force)
- 3.1%
- Adults 25+ with a bachelor's degree
- 12.6%
- Adjusted gross income per tax return, 2022
- $75,636390 returns; wages 66% 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 52078?
- Median home value (owners' estimate)
- $237,500
- Median gross rent
- –
- Homes owned by their occupants
- 97.2%
- Housing units
- 359
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 52078?
22 business establishments had a location in this ZIP code in 2023, 1 fewer than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction5
- Wholesale trade5
- 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 52078?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 52046 | Farley | 3,129 | $96k | 6.1 mi |
| 52040 | Dyersville | 5,584 | $85k | 7.6 mi |
| 52237 | Hopkinton | 1,830 | $84k | 7.9 mi |
| 52033 | Cascade | 3,292 | $69k | 9.9 mi |
| 52041 | Earlville | 1,468 | $90k | 10.4 mi |
| 52045 | Epworth | 2,777 | $92k | 10.3 mi (near) |
| 52223 | Delhi | 1,199 | $89k | 10.7 mi (near) |
| 52036 | Delaware | 135 | $85k | 12.7 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.