Fritz Heinis (9 February 1883, in Waldenburg – 16 August 1970, in La Chaux-de-Fonds) was a Swiss biologist, botanist and bryologist.
In 1919 he obtained his doctorate from the University of Basel.
He was a member of the Botanischen Kommission Basel.
[1] In the field of bryology, he collected mosses mainly in the environs of Basel, as well as in the cantons of Bern, Solothurn and Graubünden.
His herbarium is kept at the Canton Museum Baselland in Liestal.