The deal is thought to be worth about $22 million over five years, The Dallas Morning News reported. That doesn't cover a sixth option year held by the Rangers.
"Ian stands for what we believe in, both on and off the field," said Rangers General Manager Jon Daniels. "He's the right person and player for us to commit to right now, as we build towards a championship."
Kinsler, 25, hit .263 with 20 home runs and 61 runs batted in last season. He led the Rangers with 23 stolen bases and 96 runs scored. He is entering his third major league season.
Texas also has shortstop Michael Young signed to a long-term deal, giving the team its starting middle infielders at least through the 2012 season.