Rennison is a surname. Notable people with the surname include:
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Colleen Rennison (born 1987), Canadian singer-songwriter and actress
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David Rennison, British Royal Air Force air vice marshal
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Graham Rennison (born 1978), English footballer
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Louise Rennison
Louise Rennison (11 October 1951 – 29 February 2016) was an English author and comedian who wrote the '' Confessions of Georgia Nicolson'' series for teenage girls. The series records the exploits of a teenage girl, Georgia Nicolson, and her be ...
(1951–2016), English writer and comedian
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Richard Rennison (1889–1969), Scottish "anvil priest"
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