Residential delivery area · South Dakota
ZIP Code 57451: Ipswich, SD
ZIP code 57451 uses the postal name Ipswich, South Dakota and lies mostly in Edmunds County (92% of its land) with the rest in Brown County (Census 2020 ZIP-county file). About 2,500 people live there (Census Bureau, ACS 2020-2024). Median household income is $86,000 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Mina (under 1%), Ipswich (under 1%), Deerfield Colony (under 1%) and Pembrook Colony (0%); 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2023
- ZBP2023
- IRS2022
- Town
- Ipswich · its only residential ZIP
- County
- Edmunds County (92%); Brown County (8%)
- Census places
- Mina (under 1%) census-designated place; Ipswich (under 1%); Deerfield Colony (under 1%) census-designated place; Pembrook Colony (0%) census-designated place
- Micro area
- Aberdeen, SD
- House district
- SD at large 119th Congress
- State
- South Dakota
- Time zone
- Central
- Land area
- 430.2 sq mi · 6 people per sq mi
Where is ZIP code 57451?
57451 centers on 45.438°, -98.937° and covers 430.2 square miles of land plus 2.8 of water. It borders 7 ZIP codes: 57460, 57471, 57435, 57481, 57401, 57456, 57438.
The map draws ZIP code areas only. For the streets inside 57451, 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 57451 compare with the rest of Edmunds County?
| Measure | 57451 | In Edmunds County | In SD |
|---|---|---|---|
| People (ACS 2020-2024) | 2,485 | 1st of 10 | 58th of 375 |
| Median household income | $86k | 1st of 1 | 32nd of 107 |
| Median home value | $196k | 1st of 1 | 75th of 109 |
Its median household income is higher than in 69% of U.S. residential ZIP codes, and it is denser than 12% 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 57451?
The 2020 Census counted 2,381 people in 57451; the ACS, which samples households over 2020-2024, estimates 2,485. Between the 2010 and 2020 censuses its population grew 3.8% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 2,485
- 2020 Census count
- 2,381+3.8% since 2010 (2,293)
- Households
- 940
- Median age
- 41.2
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 57451?
Of the 2,485 people the ACS estimates in 57451, 25.4% are under 18 and 20.2% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (95.1%).
- Under 1825.4%
- 18 to 6454.4%
- 65 and older20.2%
- White, not Hispanic95.1%
- Hispanic or Latino3.0%
- Asian, not Hispanic1.0%
- Other or two or more0.8%
- Black, not Hispanic0.1%
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 57451 earn?
Median household income is $86,000 (ACS 2020-2024). It is not measurably different from 2015-2019 ($92,376 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $86,000±$10,247
- Income per person
- $45,069
- Below the poverty line
- 7.4%
- Unemployed (of the labor force)
- 0.8%
- Adults 25+ with a bachelor's degree
- 31.4%
- Adjusted gross income per tax return, 2022
- $94,1691,200 returns; wages 45% 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 57451?
- Median home value (owners' estimate)
- $195,700
- Median gross rent
- $1,213
- Homes owned by their occupants
- 79.0%
- Housing units
- 1,004
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 57451?
60 business establishments had a location in this ZIP code in 2023, 3 fewer than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade7
- Transportation and warehousing7
- Accommodation and food services7
- Construction6
- Wholesale trade5
- Manufacturing4
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 57451?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 57460 | Mansfield | 257 | $140k | 16.9 mi |
| 57471 | Roscoe | 546 | $68k | 18.7 mi |
| 57435 | Cresbard | 300 | $98k | 19.7 mi |
| 57481 | Westport | 271 | $68k | 19.8 mi |
| 57401 | Aberdeen | 31,939 | $69k | 19.8 mi |
| 57456 | Leola | 670 | $76k | 19.8 mi |
| 57438 | Faulkton | 973 | $71k | 27.8 mi |
| 57465 | Northville | 438 | $120k | 23.8 mi (near) |
| 57479 | Warner | 625 | $102k | 25.9 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.