THD may refer to:
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Doctor of Theology (Th.D. or D.Th. or D.Theol.)
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Thai Smile (ICAO code)
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Thames Ditton railway station, Surrey, England (National Rail station code)
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That Handsome Devil, an American alternative rock band
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THD Electronics, a guitar amplifier manufacturer
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Tho Xuan Airport (IATA code)
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Total harmonic distortion, a measure of the distortion of an audio signal
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Total Hi Def (Total HD), an optical disc format
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Transanal hemorrhoidal dearterialization, a surgical procedure
{{Disambiguation