Pluvius is an extinct town in Pacific County, in the U.S. state of Washington.
Pluvius began in the winter season between 1891 and 1892 after the build of a branch of the Northern Pacific Railroad (NP) through the area. Due to the unrelenting rainfall during the construction, rail crew informed NP headquarters that they aptly chose the name after a moniker given to the Roman god, Jupiter.
By the 1950s, the town was considered a voting precinct, listing 30 registered voters.
Pluvius was located west of the Pacific and Lewis county lines. The community was situated at a divide between the watersheds of the Chehalis and Willapa rivers, known as the "hump". Washington State Route 6 and the Willapa Hills Trail bypass the extinct town.