Alexander Eig (Hebrew: אלכסנדר איג, Belarusian: Аляксандр Эйг; 1894 – 30 July 1938) was a botanist, one of the first plant researchers in Israel, head of the department of Botany at the Hebrew University in Jerusalem and co-founder of the National Botanic Garden of Israel on Mount Scopus campus.

In 1925 he was invited by Otto Warburg to join the agricultural experimental station in Tel Aviv, where he worked with Michael Zohary.

On 1937 he was invited by Yitzhak Ben-Zvi to testify before the Peel Commission, on the question of whether the country could sustain a large population.

With Michael Zohary and Naomi Feinbrun-Dothan he organised the distribution of plant specimens from Israel in exsiccata series.

[2] The first series issued in 1930 is entitled Flora exsiccata Palaestinae a sectione botanica Universitatis Hebraicae Hierosolymitanae edita.