St Winefride's Well is a holy well located in Holywell, in Flintshire in Wales. The healing waters have been said to cause miraculous cures, since Saint Winefride had her severed head rejoined to her body at that location. The holy well is known as "the Lourdes of Wales".

After a shrine was established in Shrewsbury around 1138, it and St Winefride's Well became important destinations of pilgrimages. Some of the structures at the well date from the reign of King Henry VII, or earlier. Later King Henry VIII caused the shrine and saintly relics to be destroyed, but some have been recovered to be housed at Shrewsbury and Holywell. The Jesuits have traditionally supported the holy well.