The 2012–13 LNB Pro A season was the 91st season of the French Basketball Championship and the 26th season since inception of the Ligue Nationale de Basketball (LNB).

The regular season started on October 5, 2012 and ended on April 30, 2013.

Playoffs started on May 14 and ended on June 8, 2013.

JSF Nanterre won their first title.

Teams promoted from 2011 to 2012 Pro B (French 2nd basketball division) Teams relegated to 2012–13 Pro B Teams promoted from 2012 to 2013 Pro B Teams relegated to 2013–14 Pro B