Ignota means "unknown", in the feminine form, in Latin, and is used in some contexts when the name of a person is unknown. It may refer to:
- Elizabeth Clarke Wolstenholme-Elmy (1833–1918), English suffragist
- Plautia (mother of Aelius Caesar), also known as "Ignota Plautia"
- Lingua ignota ("unknown language"), a mystical language created by Hildegard of Bingen