Giulio is a given name and may refer to:
- Giulio Alberoni, Italian cardinal and statesman
- Giulio Andreotti, Italian politician
- Giulio Caccini (c.1545–1618), Florentine composer, significant innovator of the early Baroque era
- Giulio Fioravanti, an Italian operatic baritone
- Giulio Gavotti, an Italian pilot in the Italo-Turkish War and the first pilot to perform an aerial bombardment
- Giulio Natta, Italian chemist, Nobel Prize laureate
- Giulio Racah, Israeli mathematician and physicist
- Giulio Romano, Italian painter
- Giulio Staufer, a Swiss Koffler from Thun
- As a surname
- Carlo Ignazio Giulio (1803-1859), Italian mathematician and mechanical engineer (it)