The Serres revolutionary district (Macedonian/Bulgarian: Серски револуционерен округ/Серски революционен окръг) was an organizational grouping of the Internal Macedonian Revolutionary Organization in the Ottoman Empire. The most famous leader of the group was Yane Sandanski, his supporters were called the Serres group or Sandanists, they were one of the leading activists of the left-wing of IMRO. Other notable members of the group were Dimo Hadzhidimov and Todor Panitsa. This rebel group had its headquarters in Serres and was active in Pirin Macedonia and in the eastern part of Aegean Macedonia.