I'm So Blue may refer to:

• "I'm So Blue", song by Melanie from Photograph (Melanie album)
• I'm So Blue (Michael Jackson song)
• "I'm So Blue", song written by Randy Sharp
• "I'm So Blue", song by Katie Thompson

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• Sada Cruzeiro
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• Sadad Ibrahim Al Husseini
• SADAD Payment System
• Sadae Mazlomeen Dharna (Parachinar)
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• Sa'dah bus bombing
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• Sadaiben
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• Sadajirō Yamanaka