Joni may refer to:
- Joni (book), an autobiography by Joni Eareckson Tada
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- Joni (film), a film based on the book
- Cyclone Joni, a tropical cyclone named Joni
People with the given name Joni:
- Joni Eareckson Tada (born 1949), American author and Christian ministry founder
- Joni Jaako (born 1986), Swedish sprinter
- Joni James (born 1930), American singer of traditional pop music
- Joni T. Johnson (1934–1988), American painter
- Joni Mitchell (born 1943), Canadian musician, songwriter, and painter
- Joni Pitkänen (born 1983), Finnish hockey player