thumb|First edition (1933)
The Winding Stair is a volume of poems by Irish poet W. B. Yeats, published in September 1933. It was the next new volume after 1928's The Tower. The title poem was originally published in 1929 by Fountain Press in a signed limited edition, which is exceedingly rare.
The title is linked to the staircase in an old Norman tower in County Galway which Yeats bought and gave it the Gaelicized name Thoor Ballylee castle; Yeats would spend the summers there for about a decade, beginning in 1919. He saw the castle as a vital connection to the aristocratic Irish past which he admired. This volume capitalizes on the symbolic potential of the tower while examining the tower from the convoluted spaces within it. In a complete turnaround from his bleak outlook of eternity expressed in his previous volume (the poet admitted that he was "astonished at its bitterness"