Post Offices

There are Post Offices at the following locations:

  • Mammoth Hot Springs - Open year-around from 8:30 a.m. to 5:00 p.m. weekdays, excluding holidays. Closed Saturday and Sunday.
  • Old Faithful - Open from early-May to late-October
  • Grant Village - Open from mid-May to mid-September
  • Lake Village - Open from mid-May to mid-October
  • Canyon Village - Open from late-May to mid-September

Contact the Park

Mailing Address:

P.O. Box 168
Yellowstone National Park, WY 82190-0168


(307) 344-7381

Contact Us