ZIP code 57440
Where is ZIP code 57440?
Frankfort, South Dakota
Spink County · Standard ZIP code
ZIP code 57440 belongs to Frankfort, South Dakota in Spink County. 57440 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Central Time zone and uses area code 605. About 466 people live in the 57440 area, where the median household income is $54,625. The closest ZIP codes are 57436 (Doland, 9.8 mi east), 57469 (Redfield, 11.5 mi west) and 57476 (Tulare, 13.9 mi southwest).
| ZIP code | 57440 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Frankfort |
| State | South Dakota (SD) |
| County | Spink County |
| Time zone | Central Time · now |
| Area code | 605 |
| Coordinates | 44.8084, -98.2935 map |
| 3-digit prefix | 574 |
Population and income in 57440
| Population | 466 · lower than 58% of South Dakota ZIP codes |
|---|---|
| People per square mile | 3 · lower than 65% of South Dakota ZIP codes |
| Median age | 54.5 years · higher than 85% of South Dakota ZIP codes |
| Men / women | 53% / 47% |
| Median household income | $54,625 · lower than 87% of South Dakota ZIP codes |
| Income per person | $36,929 |
| Below the poverty line | 19% |
| Bachelor’s degree or higher | 27% of adults 25+ |
| Median home value | $132,800 · lower than 70% of South Dakota ZIP codes |
| Housing units | 165 |
| Households | 122 (3.1 people on average) |
| Owners / renters | 98% / 2.5% |
| Land area | 141.93 sq mi (plus 0.69 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 57440. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 57440
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 57436 | Doland, SD | 9.8 mi E | Standard |
| 57469 | Redfield, SD | 11.5 mi W | Standard |
| 57476 | Tulare, SD | 13.9 mi SW | Standard |
| 57424 | Ashton, SD | 17.2 mi N | Standard |
| 57348 | Hitchcock, SD | 17.4 mi SW | Standard |
| 57477 | Turton, SD | 18.5 mi NE | Standard |
| 57258 | Raymond, SD | 18.8 mi E | Standard |
| 57322 | Carpenter, SD | 21 mi SE | Standard |
| 57386 | Yale, SD | 23.4 mi SE | Standard |
| 57434 | Conde, SD | 23.9 mi N | Standard |
| 57429 | Brentford, SD | 24.6 mi N | PO Box only |
| 57461 | Mellette, SD | 26.2 mi N | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 57440 or measure the distance to another ZIP code.
How to address mail to 57440
123 MAIN ST
FRANKFORT SD 57440
Put the city, the two-letter state code and the ZIP code on the last line. Avoid Spink Colony: USPS doesn’t recognize it as the city for this ZIP code. Adding the 4-digit ZIP+4 code (57440-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 57440?
- 57440 is a Frankfort, South Dakota ZIP code.
- What county is 57440 in?
- ZIP code 57440 is in Spink County, South Dakota.
- What time zone is ZIP code 57440 in?
- 57440 is in the Central Time zone (America/Chicago).
- What area code is 57440?
- Phone numbers in ZIP code 57440 use area code 605.
- What is the population of ZIP code 57440?
- About 466 people live in ZIP code 57440, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 57440?
- The median household income in 57440 is $54,625 a year, lower than 87% of South Dakota ZIP codes.
- What ZIP codes are near 57440?
- The nearest ZIP codes to 57440 are 57436 (Doland, 9.8 miles), 57469 (Redfield, 11.5 miles), 57476 (Tulare, 13.9 miles) and 57424 (Ashton, 17.2 miles).