Orissa's Naveen Patnaik is surprisingly spry for his 59 years, which is how old he will be on October 16.
Nagaland's Neiphiu Rio is not too far behind; he will turn 55 on November 11.
Sikkim's Pawan Chamling is in the vicinity, not just geographically. He will turn 55 on September 22.
While Tripura's Manik Sarkar turned 56 in January.
Also read: What you should know about WW II