Sunan Sa'id ibn Mansur, or Sunan Sa'id bin Mansur or Sunan Sayeed bin Mansur (), is one of the Hadith book compiled in third century of the Muslim calendar. It was written by Imam Sa'id ibn Mansur (died in 227 AH).
It contains almost three thousand (3000) hadiths according to Al-Maktaba Al-Shamela. It is one of the oldest Musnad (a kind of Hadith book) written. It is written in third century of Islamic calendar and written before the Sahihain: (Sahih al-Bukhari and Sahih Muslim). The book was famous among the scholars.
The book has been published by many organizations around the world: