Regarded as one of the best batsmen in white-ball cricket, Buttler, who returns to the Lightning squad for Friday night’s NatWest T20 Blast match against Durham Jets, joined Lancashire in 2013 from his home county Somerset and has played in 70 one-day internationals 48 England T-20s and 15 Test matches.
He holds the record of scoring the three fastest one-day centuries by an England player, the quickest of which game in a 46-ball onslaught against Pakistan in Dubai last year.
Last season he made match winning contributions for Lancashire Lightning on their way to NatWest T20 Blast glory, including a stunning 71 not out off 35 balls against Yorkshire Vikings at Headingley.
Lancashire’s cricket director and head coach Ashley Giles said: “Jos is one of the most talented cricketers in the game and we are really pleased to have him for at least the next three years.
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“He has the ability to take games away from the opposition in all formats and he’s one of the leading all-rounders in English cricket.
“His presence in last year’s NatWest T20 Blast final at Edgbaston was a factor in us winning the competition.
“Jos is a great guy to have in the dressing room too and his experience at international level really benefits the squad.”
Buttler added: “I’ve really loved my time at Old Trafford and I’m looking forward to the next three years with Lancashire.
“I hope to re-pay the faith shown in me and to help Lancashire win trophies in all competitions.”
Buttler returns to the Lancashire Lightning squad for Friday evening’s NatWest T20 Blast match against Durham Jets at Emirates Old Trafford.
Lightning’s new overseas signing Martin Guptill is set to make his debut in the game.