The 2017–18 Third Amateur Football League season is the 68th season of the Bulgarian Third Amateur Football League. The group is equivalent to the third level of the Bulgarian football pyramid with four divisions existing in it. The divisions themselves are geographically separated into North-West, North-East, South-East, and South-West, covering the football clubs of their respective zones. This is the second season after the reorganization of the Bulgarian football system, which saw the emergence of new competition formats, such as First and Second Professional Football Leagues.