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. Spartans were the defending champions. East of Scotland League champions Kelty Hearts joined the league after becoming the first club to gain promotion via the Lowland League play-off, thanks to their win against South of Scotland League winners Threave Rovers at the end of the previous season.