was a town located in Iwata District, Shizuoka Prefecture, Japan.
Population
As of March 1, 2005, the town had an estimated population of 19,756 and a density of 836 persons per km<sup>2</sup>. The total area was 23.62 km<sup>2</sup>.
History
On April 1, 2005, Ryūyō, along with the towns of Fukude and Toyoda, and the village of Toyooka (all from Iwata District), was merged into the expanded city of Iwata and thus no longer exists as an independent municipality.