Alexander Davidovič von Nordmann (24 May 1803 - 25 June 1866) was a Finnish biologist.
Alexander von Nordmann was born in Ruotensalmi (now Kotka) on 24 May 1803. Nordmann was a professor at Odessa, and collected natural history specimens in southern Russia. He became professor of Zoology at the university of Helsinki in 1849. He died of heart failure on 25 June 1866.
The cladoceran Evadne nordmanni and the fir-tree Abies nordmanniana are named after him. The standard author abbreviation Nordm. is used to indicate this individual as the author when citing a botanical name.