The U.S. Postal Service has three locations on Hilton Head Island.
North End
Open: Week days, 8:30 AM–5 PM, Saturday, 9 AM–12:30 PM, Closed: Sunday
213 William Hilton Pkwy, Hilton Head Island, SC 29926
South End
Open: Week days, 8:30 AM–5 PM, Saturday, 9 AM–12:30 PM, Closed: Sunday
10 Bow Cir, Hilton Head Island, SC 29928
Sea Pines
Open: Week days, 9:30 AM–12:30 PM, Closed: Saturday and Sunday
71 Lighthouse Rd Ste 1, Hilton Head Island, SC 29928
