Takashima (高島町 Takashima-chō) was a town located in Nishisonogi District, Nagasaki, Japan.
As of 2003, the town had an estimated population of 791 and a density of 590.30 people per km². The total area was 1.34 km².
On January 4, 2005 Takashima, along with the towns of Iōjima, Kōyagi, Nomozaki, Sanwa and Sotome, all from Nishisonogi District, was merged into the expanded city of Nagasaki and no longer exists as an independent municipality.