The 2018–19 Scottish Lowland Football League (known as the Geosonic Lowland League for sponsorship reasons) was the 6th season of the Lowland Football League, the fifth tier of the Scottish football pyramid system. The season began on 28 July 2018 and ended on 20 April 2019. The Spartans were the defending champions.
Source: SLFLBBC SportSoccerway Rules for classification: 1) Points; 2) Goal difference; 3) Number of goals scored (C) Champions; (R) Relegated Notes:
^After failing to fulfil three fixtures, Selkirk resigned from the league on 28 August 2018 due to insurmountable difficulties.[6] Selkirk's record was expunged following a meeting of the Lowland League board on 3 September 2018.[7]
Initially, the winners of the East of Scotland League (Bonnyrigg Rose Athletic) did not meet the required licensing criteria for promotion at the end of the season. However they were eventually awarded their SFA licence on 14 June 2019[8] and were confirmed as promoted to the 2019–20 Lowland Football League on the same day.[9]