Tähti is a Finnish surname and Estonian feminine given name meaning "star". Notable people with the name include:
Given name Tähti Alver (born 1994), Estonian triple jumper and long jumper
Surname Annikki Tähti (1929–2017), Finnish schlager singer Filip Almström-Tähti (1991), Swedish football defender Jouni Tähti (1968), Finnish disabled pool player Leo-Pekka Tähti (1983), athlete and Paralympian from Finland
See also Takhti (surname)