Monture Creek in Montana was originally named for him as Seaman's Creek. However a transcribing error caused it to be named Scannon Creek. The dog was once thought to have been named Scannon but this has been debated often over the years.
In her book "Lewis and Clark and me : a dog's tale" (New York : Henry Holt, 2002) Laurie Myers reports that Lewis and Clark scholar, Jim Holmberg, discovered a book written in 1814 which listed epitaphs, and inscriptions. The book lists an inscription of a dog collar in a museum in Virginia. The inscription reads: "The greatest traveller of my species. My name is SEAMAN, the dog of captain Meriwether Lewis, whom I accompanied to the Pacific ocean through the interior of the continenet of North America." Holmberg's research was published in the February 2000 issue of "We Proceeded On", the newsletter of the Lewis and Clark Trail Heritage Foundation. In the fictional book by Donna Smith "Tall Tails, Cross-Country with Lewis and Clark", Seaman has a journal and the expedition is narrated by him. In the fictional book "New FoundLand", Seaman is a main character.
In 2008, Seaman became the official mascot of Lewis & Clark College's Pioneers.