Seyyed Abdollah Behbahani (Persian: سیدعبدالله بهبهانی‎, 1840–1910) was a Shi'a theologian and a prominent leader of the constitutional movement. He was born in Najaf and was educated by scholars such as Morteza Ansari.During the constitutional movement he was influential in the Majlis. On the night of 15 July 1910, four gunmen attacked his house and killed him. Seyyed Hassan Taghizadeh was suspected to be responsible, and he subsequently fled the country.