The D River is a river in Lincoln City, Oregon, United States. Proclaimed the "shortest river in the world" by the State of Oregon, it was listed in the Guinness World Records as the world's shortest river at 440 feet (134 meters). This title was lost in 1989 when Guinness named the Roe River in Montana as the world's shortest. Attempting to reclaim the title, the people of Lincoln City submitted a new measurement to Guinness of about 120 feet (36 m) marked at "extreme high tide". Starting in 2006, the Guinness Book of World Records did not list a category for shortest river.
The river flows from Devils Lake, under U.S. Route 101, and into the Pacific Ocean, entirely within the city limits of Lincoln City. The D River State Recreation site off Highway 101 is home to two of the world’s largest kite festivals in the spring and fall as part of the Portland Rose Festival.
This area was originally settled as the town of Delake, which was later incorporated with other nearby towns to form Lincoln City in 1965. The river had been known by several names, including simply "the outlet", and earned its short name in a contest.