Bristol City won the league to return to the Championship after a two-year absence.
They were unbeaten for the first 16 matches of the season and also finished with the best goal difference and best defence.
MK Dons pipped Preston North End to 2nd place on the last day of the season after the Lancashire club lost at Colchester.
But Preston were eventually promoted via the playoffs, defeating Chesterfield and Swindon 4–0 (on aggregate) and 4–0 respectively.
Leyton Orient were relegated after having contested the playoff final in 2013–14 (which they lost to Rotherham on penalties after being 2–0 up), and Crawley and Notts County were the final teams relegated to League Two for the 2015–16 season.