The 2018–19 Belgian First Amateur Division was the third season of the third-tier football league in Belgium, as it was established in 2016.
While Tessenderlo won the regular season, Virton became champions by virtue of winning the promotion play-offs.
Oudenaarde was also relegated after losing the play-offs with teams from the Belgian Second Amateur Division.
The teams finishing in the top four positions entered the promotion play-offs.
Going into the playoffs, only Deinze and Lierse had received a license, meaning that only those two teams are eligible for promotion, although Virton has successfully appealed the decision of not being handed a license and is thus also eligible for promotion.