Abstract-The energy resource-contrived is the most difficult aspect of WSN and that energy cannot be recharged. When every sensor node is needed to move ahead the data packet to the sink node, the problem emerges there. Through unmoving, listening and retransmitting, the accessible energy in every node could be lost in this procedure because of collisions as well as overhearing. Network topology management and energy minimization is done due to Cluster-based WSN routing protocols. In clustering in WSN, sensor nodes are sorted into little disjoint clusters, where every cluster has an organizer referred as CH. In this paper, energy efficient clustering techniques related to WSNs are discussed and comparative analysis is also performed.