Ajax, South Dakota
Ajax: Situated within the central Black Hills of Pennington County at an elevation of 3504 feet, this locale historically served as a gold mining camp during the region's resource boom.
About
Ajax is a city located in the county of Pennington in the U.S. state of South Dakota.
Quick Facts about Ajax
| State | South Dakota (United States) |
| County | Pennington County |
| Latitude & Longitude | 43.8975,-103.1819 |
| Time Zone | America/Denver |
| Local time | 11:20:50 (6th November 2026) |
| Weather | 35℉ Partly Cloudy 7-days weather |
Geography
Ajax is located at 43°53'51"N 103°10'55"W (43.8974900, -103.1818500).
Ajax map
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Weather
Partly cloudy. Low around 35, with temperatures rising to around 37 overnight. Southwest wind around 6 mph.
7-Day ForecastNearby Schools and Colleges
Schools and campuses linked to Ajax, SD. Select a name to open its map and contact details.
| Code | Name | City | ZIP |
|---|---|---|---|
| 219204 | National American University-Rapid City | Rapid City (SD) | 57701-2823 |
Closest post offices linked to Ajax.
| Post Office Name | City | ZIP |
|---|---|---|
| Hermosa Post Office | Hermosa (SD) | 57744 |
Other cities in Pennington County
Cities, towns, neighborhoods & other populated places in Pennington County , SD.
| City Name | Population | Title |
|---|---|---|
| Rapid City | 77,503 | The second most populous city in South Dakota. |
| Rapid Valley | 8,260 | Census-designated place in Pennington County, South Dakota |
| Box Elder | 7,165 | City in Pennington County, South Dakota, United States |
| Colonial Pine Hills | 2,493 | Township in Pennington County, South Dakota |