The Portsmouth Harbor Lighthouse is among five New England lighthouses that will be featured on stamps that are due to be issued Saturday, the U.S. Postal Service announced.

The sixth release in the lighthouse stamp series also features Portland Head in Cape Elizabeth, Maine; Boston Harbor; Point Judith in Narragansett, R.I.; and New London Harbor in Connecticut.

"We are proud to celebrate New England\'s lighthouses, which have been guiding ships and guarding the coastline for almost 300 years," said U.S. Postal Service Gov. Dennis Toner, who will dedicate the stamps Saturday at the Portland Head Light. "As some of America\'s oldest lighthouses, they continue a tradition going back to ancient civilizations, when early sailors relied on light from the shore to navigate waters."

A first-day-of-issue ceremony will be held at 10 a.m. Saturday at the Portsmouth Harbor Lighthouse, located at 25 Wentworth Road in New Castle. Similar ceremonies will be held simultaneously at the Maine and Rhode Island lighthouses and in Boston, Mass.

The New England Coastal Lighthouses Forever stamps can be ordered at www.usps.com/stamps or by calling (800) 782-6724 for delivery by mail early next week. The stamps will be available in post offices nationwide Saturday.

The stamp art for each of the lighthouses is a painting based on contemporary photographs. The New England Coastal Lighthouses Forever stamps were designed by art directors Howard E. Paine of Delaplane, Va., and Greg Breeding of Charlottesville, Va., and painted by artist Howard Koslow of Toms River, N.J.

Managed by the Friends of Portsmouth Harbor Lighthouses, the 1878 structure stands on the northeast point of Great Island on the Piscataqua River in New Castle. The lighthouse was automated in 1960 and has been on the National Register of Historic Places since 2009.