Michael Johnson (born May 9, 1984 in Austin, Texas) is a starting American football safety in the National Football League who plays for the New York Giants. He played college football at the University of Arizona.

Johnson played in 21 games with 14 starts at Arizona after transferring from Tyler Junior College. Was credited with 107 tackles (75 solo) and had 5 interceptions, 5.5 tackles for losses, a forced fumble and 2 fumble recoveries. In 2006, started all 10 games in which he played at strong safety , he earned All-Pac 10 2nd-team honors and finished 5th on the team with 47 tackles (35 solo), including 1 stop for a 7-yard loss. He caused and recovered 1 fumble, deflected 4 passes and intercepted another.

He was a 7th round (224th pick overall) draft choice by the Giants in 2007, and wore jersey number 43. Johnson joined Aaron Ross, Steve Smith, Jay Alford, Zak DeOssie, Kevin Boss, Adam Koets and Ahmad Bradshaw as 2007 Giants draft choices who contributed in their rookie season for the Giants Super Bowl XLII win. In the NFC Championship that season against the Green Bay Packers, Johnson made a critically important play late in the 4th quarter: Fellow Giant R.W. McQuarters fumbled a punt return, and as Packer Jarrett Bush wrapped his hands around the ball to recover it, Johnson dove in and punched the ball out of Bush's hands. The fumble was eventually recovered by fellow Giant Domenik Hixon, and they went on to win the game in overtime.