Chandler garnered 45 first-place votes to 41 for Ibaka, moving up from his third-place finish in last year's voting for the defensive honor.
Chandler came to New York from the NBA Champion Dallas Mavericks on a three-year deal in the off-season and has been credited with helping the Knicks make the playoffs.
He contributed 1.4 blocks and 9.9 rebounds per game over 62 contests in the lockout-shortened regular season.
New York on Wednesday faced an 0-2 deficit in its best-of-seven Eastern Conference quarterfinal series against the Heat.
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