Blight is an English surname. Notable people with this surname include the following:
David W. Blight (born 1949), American historianDigby Blight (born 1931), Former Director of Premier and Cabinet, Western AustraliaJames Blight (born 1976), Canadian voice-actorJohn Blight (1913–1995), Australian poet of Cornish ancestryJohn Thomas Blight (1835–1911), Cornish archaeological artistMalcolm Blight (born 1950), former Australian rules footballerRick Blight (1955–2005), Canadian hockey playerVicki Blight (born 1981), UK radio DJ