Magdelín Martínez Castillo (Spanish pronunciation: [maɣðeˈlim maɾˈtines]; born February 10, 1976, in Camagüey, Cuba) is a Cuban-born female triple jumper, competing internationally for Italy.

She met future husband, Giuseppe Piccotti, while he was holidaying in the Caribbean.

She naturalised in July 2001 and competed for Italy at the 2001 World Championships in Edmonton.

She finished fourth, having set a personal best of 14.59 metres in the qualification.

However, she made a small comeback in 2007 to finish seventh at the 2007 World Championships.