The magnetic properties of a Zn substituted Co1.2-xZnxTi0.2Fe1.6O4 ferrite system is studied using AC susceptibility, magnetization and Mossbauer techniques. The X-ray result confirms the single phase spinel structure for all concentrations. The results suggest that the present system exhibits a para-ferri-cluster spin glass type of magnetic ordering for x less-than-or-equal-to 0.4 while a for x > 0.4 it shows only a cluster spin glass type of magnetic ordering.