Cross sections for electron detachment and charge transfer have been measured for collisions of O-, S-, and halogen anions with neutral ozone for laboratory collision energies ranging from 3 to 500 eV. Both electron detachment and charge transfer are found to be large over the entire range of collision energies for O- and S-+O-3 whereas the cross sections for the halogen anions colliding with O-3 exhibit threshold behaviors characteristic of endothermic scattering processes.