Mya may refer to:

• Mya (unit) or million years ago, a unit of time used in astronomy, geology and biology
• Mya (genus), a genus of soft-shell clams
• MYA as Market Yield Adjustment, Finance term referring to mandatory reserves valuation

Mýa Marie Harrison (born October 10, 1979) is an American singer-songwriter, and actress. Born into a musical family, she signed with Interscope Records in 1998 and released her eponymous debut album the same year. The album was a commercial success in the United States and produced the top ten single "It's All About Me". Fear of Flying, her second album, was released in 2000 and became a worldwide success, boosted by the success of its second single "Case of the Ex". In 2002, Harrison won a Grammy Award in the category for Best Pop Collaboration with Vocals for her rendition of Labelle's 1975 hit "Lady Marmalade".