"I've Been Lonely for So Long" is a pop-soul song recorded by American southern soul singer Frederick Knight in 1972.

It was written by his wife, Posie Knight, and Jerry Weaver.

It was released as a single and peaked at number 27 on the Billboard pop chart, number 8 on the R&B chart and number 23 on the British pop chart in 1972.

[1][2] It was also released on his 1973 album of the same name.

The song is noted for its spoken recitation in the middle of the song.