"So Lonely" is a song by English rock band The Police, released as the third and final single in November 1978 from their debut studio album Outlandos d'Amour (1978), and again in February 1980 as a re-release. The song uses a reggae style, and featured Sting on lead vocals.

"So Lonely" has since been covered by a variety of artists, such as Limbeck and The Militia Group.

The song is known for a famous mondegreen where the title is often misheard as "Sue Lawley," a broadcaster famous for presenting Desert Island Discs on BBC Radio 4 from 1988 to 2006.

Sting admitted that he used Bob Marley's "No Woman, No Cry" as the basis for this song:

"People thrashing out three chords didn't really interest us musically. Reggae was accepted in punk circles and musically more sophisticated, and we could play it, so we veered off in that direction. I mean let's be honest here, 'So Lonely' was unabashedly culled from 'No Woman No Cry' by Bob Marley. Same chorus. What we invented was this thing of going back and forth between thrash punk and reggae. That was the little niche we created for ourselves."

Sting recycled the lyrics in the song's verses from his earlier Last Exit song "Fool in Love". The lyrics themselves, about someone who is lonely after getting his heart broken, were thought to be "ironic" to large audiences. Sting denied this claim, however, saying, "No, there's no irony whatsoever. From the outside it might look a bit strange, being surrounded by all this attention and yet experiencing the worst lonely feeling...but I do. And then suddenly the attention is withdrawn a half an hour later. You're so isolated..."

"So Lonely" was released as the third and final single from Outlandos d'Amour in November 1978, following "Roxanne" and "Can't Stand Losing You." The single did not chart on the first occasion but reached No. 6 with its second release. The other singles from Outlandos d'Amour followed a similar pattern of not charting very high in 1978, but doing very well on a re-release.

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