The 2016–17 Belgian Third Amateur Division was the inaugural season of the division in its current format, replacing the former Belgian Fourth Division and now placed at the fifth-tier of football in Belgium. For the inaugural season the following teams participated: * The two teams finishing last in groups A and B of the 2015–16 Belgian Third Division. * 35 teams in the groups A through D of the that either did not qualify in the top three for direct promotion, did not win promotion through the promotion play-offs or dissolved. * 23 teams promoted from the Belgian Provincial Leagues.