Piia is a Finnish[1] and Estonian feminine given name. Bearers include:
- Piia Pantsu (born 1971), Finnish equestrian rider
- Piia-Noora Kauppi (born 1975), Finnish politician
- Piia Suomalainen, (born 1984), Finnish tennis player
See also
- Namahana Piia (1787–1829), wife of King Kamehameha I of Hawaii
- PIIA or Pakistan Institute of International Affairs