The Primary Talent page lists that the Video Games singer will perform at the Somerset event on Saturday 28 June.
She joins the likes of Disclosure, Lily Allen and The Black Keys who have already been announced for the festival.
Arcade Fire have been named as headliners for the Friday night of Glastonbury.
Dolly Parton and Blondie have also been named on the line-up for the event, which takes place on Worthy Farm in Pilton.
Lana Del Rey's booking page also lists appearances at other European festivals including Rock en Seine in Paris, Ireland's Cork Live at Marquee and Norway's Bergen Festival.
Glastonbury organiser Michael Eavis recently said last year's event, which was headlined by The Rolling Stones, Arctic Monkeys and Mumford and Sons, would be hard to beat.