Sully County is one of 66 counties in South Dakota. The county seat is Onida, South Dakota.
- An agenda for the up-coming county commissioner meeting is available for download, as are 2008 meeting minutes.
- County commissioners are identified and their contact information is available.
- Contact information for administrative officials is online.
- The Register of Deeds is listed as the holder of public records, and provides forms to use in requesting documents.
- No budget or checkbook register is online.
- There is a section of the website dedicated to bids but it is empty.
- No audit or lobbying information is available.
- Taxes are not explained.