Sadr may refer to:
- Gamma Cygni, a star
- Sadr City, a neighbourhood in northeastern Baghdad
- Sadr, a family name originating in Lebanon
- Sahrawi Arab Democratic Republic (SADR), the self-proclaimed state, established in 1976 by Polisario Front in parts of Western Sahara
- Ziziphus zizyphus (Jujube), a plant
- Muqtada al-Sadr, Iraqi politician and organizer of the Mahdi Army