Written and first recorded by Allen Toussaint (1975).
Hit version by Glen Campbell (US #1/MOR #1/C&W #1/CAN #1/UK #28/AUS #36/NZ #10/IRE #3 1977).
From the wiki: “‘Southern Nights’ was written and recorded by Allen Toussaint, from his 1975 album, Southern Nights. It was later recorded by Glen Campbell, with a more up-tempo arrangement and modified lyrics (and a unique guitar lick that Campbell had learned from his friend, Jerry Reed), and released as the first promotional single from Campbell’s 1977 album, also titled Southern Nights.
“The lyrics of ‘Southern Nights’ were inspired by childhood memories Allen Toussaint had of visiting relatives in the Louisiana backwoods, which often entailed storytelling under star-filled nighttime skies. When Campbell heard Toussaint’s version, he immediately identified with the lyrics because they too reminded him of his own youth growing up on an Arkansas farm.