"Leave a Light On" is a song by British singer-songwriter Tom Walker.

[1] The song was co-written by Walker and Steve Mac.

The song reached the top 10 in Austria, Wallonia, Germany, Italy and Switzerland, while reaching the top 40 in Australia, Flanders, France, Poland and the Netherlands.

An acoustic version of the track, arranged and produced by Cliff Masterson was featured in the Sony Bravia TV advert.

In an interview with Idolator, Walker revealed that the song was about a friend of his who was struggling with addiction, and explained that he wrote it for his "family and [his] friends to let them know that [they] can talk about it.