Gardiner is an unincorporated community and census-designated place in Douglas County, Oregon, United States, across the Umpqua River from Reedsport.

[3] Gardiner is named for a Boston merchant whose ship, the Bostonian, shipwrecked at the mouth of the Umpqua on October 1, 1850.

[4] In 1851, the site became the headquarters of the Umpqua customs district, and a post office named "Gardiners City" was established the same year.

A plywood plant opened in Gardiner in 1954, joining the lumber mill (or sawmill) that had been in the town for many years.

[citation needed] Gardiner was formerly the site of the first International Paper mill on the West Coast.