The former Super Bowl MVP and reigning Dancing With the Stars champ was booked into the DeKalb County jail just outside Atlanta at 3:41 a.m. and charged with driving under the influence. He was released on $1,300 bond.
The sheriff's office said it had turned over paperwork to the courts and couldn't release any further information about the player's arrest.
A Steelers spokesman did not immediately respond to a message, and it was not immediately clear if Ward had an attorney.
Since being drafted in the third round out of Georgia in 1998, the 35-year-old Ward has been a four-time Pro Bowl selection and won two Super Bowls.
Dancing with professional partner Kym Johnson, Ward in May became the second professional football player to win the "Dancing" crown after Emmitt Smith won in 2006. He bested actresses Kirstie Alley and Chelsea Kane to become the season 12 champion of the TV celebrity dance competition.