Bisei (美星町, Bisei-chō) was a town located in Oda District, Okayama Prefecture, Japan.

As of 2003, the town had an estimated population of 5,421 and a density of 74.57 persons per km². The total area was 72.70 km².

On March 1, 2005, Bisei, along with the town of Yoshii (from Shitsuki District), was merged into the expanded city of Ibara.^[1]

Bisei was known for the Bisei Spaceguard Center.