Francis Raymond "Frank" Callaghan (15 April 1891 – 10 March 1980) was a New Zealand teacher, agricultural instructor and scientific administrator.
Callaghan was born on 15 April 1891 at Lincoln. He succeeded Ernest Marsden as secretary of the Department of Scientific and Industrial Research (DSIR). He was president of the Royal Society of New Zealand. He died on 10 March 1980 in the Christchurch suburb of Halswell.
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