Residential delivery area · Iowa
ZIP Code 52556: Fairfield, IA
ZIP code 52556 uses the postal name Fairfield, Iowa and lies entirely in Jefferson County (Census 2020 ZIP-county file). About 11,000 people live there (Census Bureau, ACS 2020-2024), the more populous of Fairfield's 2 residential ZIP codes. Median household income is $59,243 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Fairfield (4%) and Maharishi Vedic City (2%); 95% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Fairfield · 2 residential ZIPs
- County
- Jefferson County
- Census places
- Fairfield (4%); Maharishi Vedic City (2%)
- House district
- IA-1 119th Congress
- State
- Iowa
- Time zone
- Central
- Land area
- 175.5 sq mi · 65 people per sq mi
Where is ZIP code 52556?
52556 centers on 41.024°, -91.928° and covers 175.5 square miles of land plus 0.5 of water. It borders 9 ZIP codes: 52557, 52635, 52567, 52580, 52540, 52535, 52533, 52585, 52651.
The map draws ZIP code areas only. For the streets inside 52556, 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 52556 compare with the rest of Fairfield?
| Measure | 52556 | In Fairfield | In Jefferson County | In IA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 11,448 | 1st of 2 | 2nd of 16 | 73rd of 970 |
| Median household income | $59k | 1st of 1 | 5th of 6 | 367th of 396 |
| Median home value | $167k | 1st of 1 | 2nd of 6 | 268th of 423 |
Its median household income is higher than in 28% of U.S. residential ZIP codes, and it is denser than 47% 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 52556?
The 2020 Census counted 11,736 people in 52556; the ACS, which samples households over 2020-2024, estimates 11,448. Between the 2010 and 2020 censuses its population fell 11.4% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 11,448
- 2020 Census count
- 11,736−11.4% since 2010 (13,247)
- Households
- 5,377
- Median age
- 45.2
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 52556?
Of the 11,448 people the ACS estimates in 52556, 16.7% are under 18 and 30.2% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (80.2%).
- Under 1816.7%
- 18 to 6453.1%
- 65 and older30.2%
- White, not Hispanic80.2%
- Asian, not Hispanic9.5%
- Hispanic or Latino5.1%
- Other or two or more3.2%
- Black, not Hispanic2.0%
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 52556 earn?
Median household income is $59,243 (ACS 2020-2024), the 5th highest of the 6 ranked ZIP codes in Jefferson County. It is not measurably different from 2015-2019 ($56,151 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $59,243±$13,685
- Income per person
- $40,168
- Below the poverty line
- 16.8%
- Unemployed (of the labor force)
- 8.9%
- Adults 25+ with a bachelor's degree
- 48.0%
- Adjusted gross income per tax return, 2022
- $74,8695,290 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 52556?
FHFA's house price index for 52556, built from repeat sales and appraisals of the same homes, rose 48% from 2015 to 2025 and rose 40% from 2020 to 2025, and moved +0.1% in 2025.
- Median home value (owners' estimate)
- $166,800
- Median gross rent
- $878
- Homes owned by their occupants
- 63.6%
- Housing units
- 6,044
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 52556?
552 business establishments had a location in this ZIP code in 2023, 68 fewer than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services112
- Retail trade80
- Other services (except public administration)50
- Health care and social assistance44
- Accommodation and food services43
- Finance and insurance40
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 52556?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 52557 | Fairfield | 685 | – | 2.0 mi |
| 52635 | Lockridge | 890 | $76k | 9.0 mi |
| 52567 | Libertyville | 506 | $82k | 9.9 mi |
| 52580 | Packwood | 711 | $53k | 10.2 mi |
| 52540 | Brighton | 1,088 | $55k | 10.7 mi |
| 52535 | Birmingham | 725 | $75k | 11.3 mi |
| 52533 | Batavia | 1,201 | $63k | 11.5 mi |
| 52585 | Richland | 838 | $76k | 11.8 mi |
| 52651 | Stockport | 398 | $37k | 12.6 mi |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.