Founded on Jan 15, 1851, Buena Vista County is one of 99 counties in the state of Iowa. Historically, Buena Vista County was formed from Clay County and Sac County. The city of Storm Lake is the county seat. With FIPS code of 21, Buena Vista County has a population of 20,771 and area of 575 square miles (1,489 km2).
List of all cities in Buena Vista County, IA alphabetically
| City/Town | Postal Code | Area Code |
| Albert City, IA | 50510 | 712 |
| Alta, IA | 51002 | 712 |
| Bel Air Beach, IA | 50588 | 712 |
| Casino Beach, IA | 50588 | 712 |
| Cornell, IA | 50585 | 712 |
| Hanover, IA | 51002 | 712 |
| Juniata, IA | 50588 | 712 |
| Lakeside, IA | 50588 | 712 |
| Linn Grove, IA | 51033 | 712 |
| Marathon, IA | 50565 | 712 |
| Newell, IA | 50568 | 712 |
| Rembrandt, IA | 50576 | 712 |
| Sioux Rapids, IA | 50585 | 712 |
| Storm Lake, IA | 50588 | 712 |
| Sulphur Springs, IA | 50588 | 712 |
| Truesdale, IA | 50592 | 712 |
| West Storm Lake, IA | 50588 | 712 |