Mn2+ substituted Zn ferrite nano particles have been synthesized using two different wet methods, sol-gel and co-precipitation. The doping effect of Mn2+ ion concentration on physical properties like structural and magnetic properties is investigated. The crystallite size and lattice parameter increases with increasing Mn2+ concentration. EPR study reveals that the line width and g-factor increases with increasing Mn2+ concentration for co-precipitated particles whereas the reverse trend for sol-gel technique is observed. However, in both the processes the saturation magnetization (Ms) and coercivity (Hc) increase with increasing Mn2+ concentration. In a comparative study, the nano particles synthesized by sol-gel are more crystalline in nature as compared to co-precipitated particles.