"So Long, It's Been Good to Know Yuh" is a song by American folk musician Woody Guthrie released as part of his album Dust Bowl Ballads. The composition is considered one of Guthrie's best songs, defining his style, and demonstrating his "increasing comfort with writing topical songs about the poor and downtrodden". It has been categorized as a "Dust Bowl ballad" by music critics. The song was also included in the Library of Congress Recordings from 1940 made by Guthrie and Alan Lomax.