Skullcap or skull cap may refer to:
- Calvaria (skull), in anatomy, the top part of the skull
- Headgear:
- A Kippah or yarmulke, is a small cloth skullcap usually worn by Jewish men of most denominations while at prayer, some Jewish women at prayer, and Orthodox men at all times.
- Kufi, or kofia, a skullcap worn primarily by men of West African heritage
- Taqiyah (cap), a skullcap worn by some Muslim men
- Tubeteika, a Central Asian cap
- Tuque, a knit hat
- Zucchetto, worn by Catholic clergy (including the Pope)
- Beanie, a brimless cap popular amongst school age boys from the 1920s to the early 1940s
- Sports headgear produced by Under Armour that resembles a swimming cap
- An iron helmet (known as a capeline) worn under civilian hats during the medieval and early modern periods
- A Ski mask
- Plants of the genus Scutellaria, such as S. lateriflora, used in herbal medicine
- Galerina autumnalis, or autumn skullcap, a poisonous mushroom
- Skullcap, ruins in the fictional Dragonlance universe