Founded in 1879, Brown County is one of 66 counties in the state of South Dakota. Historically, Brown County was formed from Beadle County. The city of Aberdeen is the county seat. With FIPS code of 13, Brown County has a population of 38,101 and area of 1,713 square miles (4,437 km2).
List of all cities in Brown County, SD alphabetically
| City/Town | Postal Code | Area Code |
| Aberdeen, SD | 57401 | 605 |
| 57402 | 605 | |
| Barnard, SD | 57426 | 605 |
| Bath, SD | 57427 | 605 |
| Beebe, SD | 57401 | 605 |
| Brainard, SD | 57426 | 605 |
| Claremont, SD | 57432 | 605 |
| Columbia, SD | 57433 | 605 |
| Elm Lake, SD | 57441 | 605 |
| Ferney, SD | 57439 | 605 |
| Frederick, SD | 57441 | 605 |
| Groton, SD | 57445 | 605 |
| Hecla, SD | 57446 | 605 |
| Houghton, SD | 57449 | 605 |
| Huffton, SD | 57432 | 605 |
| James, SD | 57445 | 605 |
| Mansfield, SD | 57460 | 605 |
| Ordway, SD | 57401 | 605 |
| Putney, SD | 57445 | 605 |
| Randolph, SD | 57474 | 605 |
| Sand Lake, SD | 57433 | 605 |
| Stratford, SD | 57474 | 605 |
| Tacoma Park, SD | 57433 | 605 |
| Warner, SD | 57479 | 605 |
| Westport, SD | 57481 | 605 |
| Wetonka, SD | 57481 | 605 |