Yoshii was a town located in Ukiha District, Fukuoka Prefecture, Japan. As of 2003, the town had an estimated population of 17,223 and a density of 608.80 persons per km2. The total area was 28.29 km2. On March 20, 2005, Yoshii, along with the former town of Ukiha, was merged to create the city of Ukiha.