XMI may refer to:

• Masasi Airport (IATA airport code XMI)
• Xinmi (geocode XMI), Zhengzhou, Henan, China; see List of administrative divisions of Henan
• Miarrã language (ISO 639:xmi language code)
• XML Metadata Interchange, a standard for exchanging metadata information
• XMI, an ETF operated by Blackrock on the TSX; see List of Canadian exchange-traded funds
• XMI (stock index), the AMEX Major Market Index
• XM (album) (aka XMI or XM 1), 2003, the first XM album by Porcupine Tree

• XMII (aka XM 2), 2005, the second XM album by Porcupine Tree
• XM1 (disambiguation)
• XML (disambiguation)