Sor may refer to:
- Fernando Sor (1778-1839), a Spanish guitarist and composer
- Sor, Azerbaijan, a village
- River Sor, any of a number of rivers
SOR may stand for:
- Sean O'Rourke, Irish broadcaster and journalist
- Southern Ontario Railway, a shortline railway in southern Ontario
- School of Rock, 2003 film starring Jack Black
- Son of Rambow, 2008 film starring Bill Milner and Will Poulter
- Sex offender registration
- Smart Order Routing, a rule-based mechanism for selecting the destination of trading orders
- Society of Radiographers, a UK trade union
- Steam to oil ratio, the ratio of water used for steam and oil in oil production.
- Streets of Rage, a popular beat 'em up series developed by Sega
- Successive over-relaxation, a numerical method used to speed up convergence
- System of record, an information storage system
- Equality Act (Sexual Orientation) Regulations (UK legislation)