- Aylward Manley Blackman Eminent Egyptologist who exacavated sites in Egypt & Sudan. Brunner professor of Egyptology at the University of Liverpool 1934-1948 & Emeritus professor 1948-1956
- Frederick Ernest Blackman Professional Footballer who played for Brighton & Hove Albion, Huddersfield & Leeds
- Frederick Frost Blackman A botanist who did extensive research into photosynthesis in plants. The Blackman reactions of photosynthesis are named after him.
- George Blackman In 1821, with royal permission assumed the name Sir George Harnage
- Henry Blackman Knighted by King George in 1782, Sir Henry was a successful wine merchant in Lewes, Sussex
- Jack Blackman Australian Rules Footballer who played for Hawthorn in the 1940s and won their best & fairest
- James Blackman Puported to be the leader of a gang of smugglers in Sussex
- John Herbert Blackman Winner of the prestigious Doggett's Coat & Badge rowing race in 1917
- Meredith George Blackman Awarded the Distinguished Conduct Medal & the Military Medal with two Bars during WW1
- Vernon Herbert Blackman Brother of Frederick Frost Blackman above, and a famous botanist in his own right