Heki, Yamaguchi

 was a town located in Ōtsu District, Yamaguchi Prefecture, Japan.
As of 2003, the town had an estimated population of 4,602 and a density of 102.68 persons per km². The total area was 44.82 km².
On March 22, 2005, Heki, along with the towns of Misumi and Yuya (all from Ōtsu District), was merged into the expanded city of Nagato.