The 2005–06 Miami Heat season was the 18th National Basketball Association season for the Miami Heat basketball franchise. The highlight of the season was winning the 2006 NBA Finals and their first NBA Championship. The team was nicknamed "15 Strong".

The team's season roster is featured in the video games NBA 2K16 and NBA 2K17.

On the same day, the Heat would sign Kasib Powell. He would sign with the Chicago Bulls on September 29, and the Bulls waived him on November 2. Powell may not have played on the Heat during the season, but would join the team two seasons later.

In Shaquille O'Neal's book, "Shaq Uncut: My Story", O'Neal responded to allegations of being a "coach killer" and that he forced Van Gundy out of Miami by stating: "Stan got fired because Pat (Riley) wanted to take over, not because I wanted him out. I had no control over it — not a smidgen of control. We all kind of knew it was coming because Pat and Stan were always arguing. Pat would come down and tell Stan how to do something and Stan would want to do it his own way, and that was a fine game plan if you wanted to get yourself fired."

* Statistics include only games with the Heat

Heat clinched a 2 seed at the Eastern Conference for the 2006 NBA Playoffs.

Dallas' Jason Terry scored a playoff-high 32 points as the Mavericks overcame a 31–23 deficit at the end of the first quarter.

Dirk Nowitzki had a stellar 26 point-16 rebound performance, and the Mavericks cruised past the Heat to take a 2–0 series lead.

Led by Dwyane Wade's 42 points and 13 rebounds, the Heat rallied from a 13-point deficit with six minutes to go in the fourth quarter. The momentum-changing comeback was capped by a Gary Payton field goal from just inside the three-point line with 9.3 seconds left.

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