301 Main Ave Sinai, SD 57061
Phone: 605-826-4306
| Post Office Lobby Hours | |
|---|---|
| Monday | 12:01am - 11:59pm |
| Tuesday | 12:01am - 11:59pm |
| Wednesday | 12:01am - 11:59pm |
| Thursday | 12:01am - 11:59pm |
| Friday | 12:01am - 11:59pm |
| Saturday | 12:01am - 11:59pm |
| Sunday | Closed |
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Sinai Post Office is a United States Postal Service (USPS) facility in Sinai, SD. This post office offers a full array of services, including package delivery and first class mail.
Mailboxes in Sinai