"He's respected by his peers and the wider cricket community for his professional approach both on and off the field, and has a superb cricket brain.
"His drive to see the team succeed and his passion for the game are what you look for in a leader. He's ready for the role and will only continue to grow."
Williamson, who is currently in India playing in the IPL, said it was a challenge he was looking forward to, but one he knew he wouldn't face without a great deal of support.
"It's certainly an honour. I've really enjoyed my time spent as captain and believe this team can achieve a lot," said Williamson.
"I'm lucky to have a number of experienced players around me for support and will certainly look to utilise this. We're all striving for the same thing and that's to represent New Zealand with pride and win cricket games."
Williamson also singled out the work done by predecessor Brendon McCullum, and praising the environment inside the changing-room.
"I've certainly learnt a lot from Brendon, as has everyone who has played with him.
"The culture that he and Mike have cultivated has been a huge part of this team's success in recent times. We not only have good players, but good people too and that certainly makes any captain's job easier."
The Black Caps next tour will be of Africa in July-August, with the BLACKCAPS scheduled to play two tests in both Zimbabwe and South Africa.
