ZIP code 57751
Where is ZIP code 57751?
Keystone, South Dakota
Pennington County · Standard ZIP code
ZIP code 57751 belongs to Keystone, South Dakota in Pennington County. 57751 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 code 605. About 893 people live in the 57751 area, where the median household income is $97,969. The closest ZIP codes are 57702 (Rapid City, 8.5 mi north), 57745 (Hill City, 9.6 mi west) and 57744 (Hermosa, 10.7 mi southeast).
| ZIP code | 57751 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Keystone |
| State | South Dakota (SD) |
| County | Pennington County |
| Time zone | Mountain Time · now |
| Area code | 605 |
| Coordinates | 43.8848, -103.3995 map |
| 3-digit prefix | 577 |
Population and income in 57751
| Population | 893 · higher than 58% of South Dakota ZIP codes |
|---|---|
| People per square mile | 20 · higher than 82% of South Dakota ZIP codes |
| Median age | 54.2 years · higher than 84% of South Dakota ZIP codes |
| Men / women | 54% / 46% |
| Median household income | $97,969 · higher than 86% of South Dakota ZIP codes |
| Income per person | $43,414 |
| Below the poverty line | 4.6% |
| Bachelor’s degree or higher | 43% of adults 25+ |
| Median home value | $473,500 · higher than 99% of South Dakota ZIP codes |
| Median rent | $600 a month |
| Housing units | 477 |
| Households | 327 (2.67 people on average) |
| Owners / renters | 86% / 14% |
| Land area | 44.22 sq mi (plus 0.01 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 57751. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 57751
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 57702 | Rapid City, SD | 8.5 mi N | Standard |
| 57745 | Hill City, SD | 9.6 mi W | Standard |
| 57744 | Hermosa, SD | 10.7 mi SE | Standard |
| 57709 | Rapid City, SD | 13.8 mi N | PO Box only |
| 57730 | Custer, SD | 15.8 mi S | Standard |
| 57703 | Rapid City, SD | 15.8 mi NE | Standard |
| 57738 | Fairburn, SD | 18 mi SE | Standard |
| 57718 | Black Hawk, SD | 20.2 mi N | Standard |
| 57701 | Rapid City, SD | 20.2 mi NE | Standard |
| 57773 | Pringle, SD | 21.4 mi SW | PO Box only |
| 57719 | Box Elder, SD | 23.1 mi NE | Standard |
| 57759 | Nemo, SD | 23.6 mi N | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 57751 or measure the distance to another ZIP code.
How to address mail to 57751
123 MAIN ST
KEYSTONE SD 57751
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (57751-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 57751?
- 57751 is a Keystone, South Dakota ZIP code.
- What county is 57751 in?
- ZIP code 57751 is in Pennington County, South Dakota.
- What time zone is ZIP code 57751 in?
- 57751 is in the Mountain Time zone (America/Denver).
- What area code is 57751?
- Phone numbers in ZIP code 57751 use area code 605.
- What is the population of ZIP code 57751?
- About 893 people live in ZIP code 57751, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 57751?
- The median household income in 57751 is $97,969 a year, higher than 86% of South Dakota ZIP codes.
- What ZIP codes are near 57751?
- The nearest ZIP codes to 57751 are 57702 (Rapid City, 8.5 miles), 57745 (Hill City, 9.6 miles), 57744 (Hermosa, 10.7 miles) and 57709 (Rapid City, 13.8 miles).