The Wales flanker will become only the second player to do the job twice, following on from England's Martin Johnson, who lead the Lions in the 1997 and 2001 tours.
After an outstanding Six Nations, Warburton was handed the captaincy by Warren Gatland and the 28-year-old's head coach at Cardiff Blues, Danny Wilson, has no doubt he is the man for the job.
"When you think of the Lions and the amount of top-quality players and leaders that they will have, there will be more than one guy leading the ship," Wilson said. "There will be leaders right across all areas, on and off the field.
"What Sam brings as a leader is he leads by example. That is probably his biggest trait. His work ethic, his professionalism, the way he conducts himself on and off the field is an example that people follow."