Residential delivery area · Iowa
ZIP Code 52237: Hopkinton, IA
ZIP code 52237 uses the postal name Hopkinton, Iowa and lies mostly in Delaware County (96% of its land), reaching into Jones County and Dubuque County (Census 2020 ZIP-county file). About 1,800 people live there (Census Bureau, ACS 2020-2024). Median household income is $84,063 (Census Bureau, ACS 2020-2024). By Census place, under 1% of its land lies in Hopkinton; more than 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2022
- ZBP2023
- IRS2022
- Town
- Hopkinton · its only residential ZIP
- County
- Delaware County (96%); Jones County (3%); Dubuque County (2%)
- Census places
- Hopkinton
- House districts
- IA-2 (97%), IA-1 (3%) 119th Congress, by share of land
- State
- Iowa
- Time zone
- Central
- Land area
- 84.1 sq mi · 22 people per sq mi
Where is ZIP code 52237?
52237 centers on 42.341°, -91.252° and covers 84.1 square miles of land plus 0.0 of water. It borders 8 ZIP codes: 52223, 52078, 52310, 52041, 52330, 52033, 52057, 52218.
The map draws ZIP code areas only. For the streets inside 52237, 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 52237 compare with the rest of Delaware County?
| Measure | 52237 | In Delaware County | In IA |
|---|---|---|---|
| People (ACS 2020-2024) | 1,830 | 4th of 16 | 302nd of 970 |
| Median household income | $84k | not ranked | not ranked |
| Median home value | $167k | 6th of 8 | 268th of 423 |
52237's median household income is not ranked: its 90% margin of error (±$26,299) is more than a quarter of the figure ($84,063). 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 52237?
The 2020 Census counted 1,593 people in 52237; the ACS, which samples households over 2020-2024, estimates 1,830. Between the 2010 and 2020 censuses its population grew 4.7% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 1,830±384 (90% margin)
- 2020 Census count
- 1,593+4.7% since 2010 (1,522)
- Households
- 585
- Median age
- 27.7
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 52237?
Of the 1,830 people the ACS estimates in 52237, 39.6% are under 18 and 15.1% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (96.2%).
- Under 1839.6%
- 18 to 6445.3%
- 65 and older15.1%
- White, not Hispanic96.2%
- Other or two or more2.4%
- Hispanic or Latino1.4%
- 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 52237 earn?
Median household income is $84,063 (ACS 2020-2024). It is not measurably different from 2015-2019 ($86,498 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $84,063±$26,299
- Income per person
- $32,449
- Below the poverty line
- 13.1%
- Unemployed (of the labor force)
- 3.3%
- Adults 25+ with a bachelor's degree
- 17.4%
- Adjusted gross income per tax return, 2022
- $69,801680 returns; wages 64% 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 52237?
- Median home value (owners' estimate)
- $166,800
- Median gross rent
- $416
- Homes owned by their occupants
- 87.9%
- Housing units
- 661
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 52237?
29 business establishments had a location in this ZIP code in 2023, 5 fewer than in 2018; the most are in manufacturing (ZIP Code Business Patterns).
- Manufacturing7
- Wholesale trade6
- Construction4
- Transportation and warehousing3
- Accommodation and food services3
- Other services (except public administration)3
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 52237?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 52223 | Delhi | 1,199 | $89k | 6.2 mi |
| 52078 | Worthington | 870 | $98k | 7.9 mi |
| 52310 | Monticello | 6,450 | $86k | 8.8 mi |
| 52041 | Earlville | 1,468 | $90k | 11.4 mi |
| 52330 | Ryan | 940 | $87k | 12.7 mi |
| 52033 | Cascade | 3,292 | $69k | 13.5 mi |
| 52057 | Manchester | 8,193 | $70k | 14.6 mi |
| 52218 | Coggon | 1,413 | $82k | 15.0 mi |
| 52252 | Langworthy | 13 | – | 10.0 mi (near) |
| 52036 | Delaware | 135 | $85k | 10.2 mi (near) |
| 52219 | Prairieburg | 143 | $45k | 11.4 mi (near) |
| 52040 | Dyersville | 5,584 | $85k | 12.6 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.