- ZSR stands for Z. Smith Reynolds (foundation; North Carolina)
- ZSR stands for Zeleznice Slovenskej Republiky (railway of Slovakia)
- ZSR stands for Zeta Sedimentation Ratio
- ZSR stands for Zero State Response (electric circuitry theory)
- ZSR stands for Zimbabwe Sugar Refineries
- ZSR stands for Zajednica Srba Rijeka (Croatian: Rijeka Serb Community; Rijeka, Croatia)
ZSR