This paper presents an energy efficient cluster ID based routing scheme with maximum residual node energy as one of routing metrics. The uneven load in network is minimized by cluster size adaptation technique. Our new routing protocol CIDRSN (Cluster ID based Routing in Sensor Networks) takes the cluster ID as next hop address instead of cluster-head ID) in routing table and eliminate the cluster formation phase and routing phase from being executed in each round. Both cluster formation and routing phases are only executed during the initialization of network, which reduces the energy consumption and increases the network life to about 16%. Robustness is increased by multi-path routing. Simulation results show that CIDRSN outperforms the preceding hierarchical routing protocols.