SINAI (updated 02/03/2019)
301 MAIN AVE SINAI, SD 57061 - 9998
Street Parking Available
Phone 605-826-4306
Fax 605-357-4906
TTY 877-889-2457
Retail Hours
- Mon-Sat 10:00am - 12:00pm
- Sun Closed
Lobby Hours
- Mon-Sat 12:01am - 11:59pm
- Sun Closed
Last Collection Hours
- Mon-Sat 12:00pm
- Sun Closed
PO Box Access Hours
- Mon-Sat 12:01am - 11:59pm
- Sun Closed
Pickup Services Hours
- Mon-Sat 10:00am - 12:00pm
- Sun Closed
On-Site Services
- Business Line
- Business Reply Mail Account Balance
- Business Reply Mail New Permit
- Duck Stamps
- General Delivery
- Money Orders (Domestic)
- Money Orders (Inquiry)
- Money Orders (International)
- PO Box Online
- Pickup Accountable Mail
- Pickup Hold Mail
- Priority Mail International®