The 44-year-old has agreed a two-year deal at Easter Road, replacing Alan Stubbs who recently left for Rotherham United.
Lennon will lead Hibs in the Scottish Championship as well as the second qualifying round of the Europa League following their Scottish Cup triumph under Stubbs last month.
"We are delighted to have secured a head coach of Neil's calibre and profile," said Hibs chairman Rod Petrie.
"We look forward to him bringing his drive and mentality to our campaign to win the Championship this season and secure promotion back to the top flight of Scottish football."
Hibernian is pleased to confirm Neil Lennon as our new Head Coach, joining on a 2 year deal: https://t.co/yrWxSL2LVGpic.twitter.com/tyqW2ZA7rI
— Hibernian FC (@HibsOfficial) June 8, 2016