thumb|Yokomatsu city hall (former office for the village of Yokomatsu).
was a town located in Aira District, Kagoshima Prefecture, Japan.
As of 2003, the town had an estimated population of 4,818 and the density of 88.44 persons per km<sup>2</sup>. The total area was 54.48 km<sup>2</sup>.
On March 22, 2005, Yoshimatsu, along with the town of Kurino (also from Aira District), was merged to create the town of Yūsui and no longer exists as an independent municipality.