Yoshii (吉井町 Yoshii-machi) was a town located in Ukiha District, Fukuoka, Japan.
On March 20, 2005 Yoshii was merged with the town of Ukiha, also from Ukiha District, to form the new city of Ukiha.
In 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.