ZIP code 57720
Where is ZIP code 57720?
Buffalo, South Dakota
Harding County · Standard ZIP code
ZIP code 57720 belongs to Buffalo, South Dakota in Harding County. 57720 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Mountain Time zone and uses area codes 605 and 701. About 518 people live in the 57720 area, where the median household income is $79,091. The closest ZIP codes are 57776 (Redig, 21 mi south), 57755 (Ludlow, 21.4 mi northeast) and 57724 (Camp Crook, 23.9 mi west).
| ZIP code | 57720 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Buffalo |
| State | South Dakota (SD) |
| County | Harding County |
| Time zone | Mountain Time · now |
| Area codes | 605, 701 |
| Coordinates | 45.574, -103.5826 map |
| 3-digit prefix | 577 |
Population and income in 57720
| Population | 518 · lower than 55% of South Dakota ZIP codes |
|---|---|
| People per square mile | 0 · lower than 98% of South Dakota ZIP codes |
| Median age | 52.3 years · higher than 80% of South Dakota ZIP codes |
| Men / women | 61% / 39% |
| Median household income | $79,091 · higher than 61% of South Dakota ZIP codes |
| Income per person | $51,037 |
| Below the poverty line | 12% |
| Bachelor’s degree or higher | 25% of adults 25+ |
| Median home value | $157,000 · lower than 61% of South Dakota ZIP codes |
| Median rent | $586 a month |
| Housing units | 378 |
| Households | 264 (1.96 people on average) |
| Owners / renters | 81% / 19% |
| Land area | 1296.16 sq mi (plus 4.19 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 57720. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 57720
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 57776 | Redig, SD | 21 mi S | PO Box only |
| 57755 | Ludlow, SD | 21.4 mi NE | Standard |
| 57724 | Camp Crook, SD | 23.9 mi W | Standard |
| 57651 | Reva, SD | 25 mi E | Standard |
| 59319 | Capitol, MT | 30.8 mi W | Standard |
| 57650 | Ralph, SD | 32.8 mi NE | Standard |
| 57649 | Prairie City, SD | 37.4 mi E | Standard |
| 59311 | Alzada, MT | 40.9 mi SW | Standard |
| 58651 | Rhame, ND | 41.4 mi N | Standard |
| 58653 | Scranton, ND | 41.7 mi NE | Standard |
| 58623 | Bowman, ND | 42.3 mi N | Standard |
| 57640 | Lodgepole, SD | 43.3 mi NE | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 57720 or measure the distance to another ZIP code.
How to address mail to 57720
123 MAIN ST
BUFFALO SD 57720
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (57720-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 57720?
- 57720 is a Buffalo, South Dakota ZIP code.
- What county is 57720 in?
- ZIP code 57720 is in Harding County, South Dakota.
- What time zone is ZIP code 57720 in?
- 57720 is in the Mountain Time zone (America/Denver).
- What area code is 57720?
- Phone numbers in ZIP code 57720 use area codes 605 and 701.
- What is the population of ZIP code 57720?
- About 518 people live in ZIP code 57720, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 57720?
- The median household income in 57720 is $79,091 a year, higher than 61% of South Dakota ZIP codes.
- What ZIP codes are near 57720?
- The nearest ZIP codes to 57720 are 57776 (Redig, 21 miles), 57755 (Ludlow, 21.4 miles), 57724 (Camp Crook, 23.9 miles) and 57651 (Reva, 25 miles).