Leakage may refer to:
- Leakage (chemistry)
- Memory leak, in computer science
- Leakage (economics)
- Leakage (electronics)
- Leakage (retail)
- Leakage (semiconductors)
- Crosstalk (electronics), also known as Leakage, where signals are picked up by an unintended device
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- Spill (audio), where audio from one source is picked up by a microphone intended for a different source
- Fecal incontinence
- Urinary incontinence
- Leakage effect, the loss of tourist revenue from a country
- Spectral leakage in signal processing