Heinrich Gustav Bassermann (12 July 1849 – 30 August 1909) was a German Lutheran theologian born in Frankfurt am Main.
At Jena he was a pupil of Karl August Hase (1800–1890), and in Heidelberg he studied under Heinrich Julius Holtzmann (1832–1910).
During this time period he also served with a dragoon unit in the Franco-Prussian War (1870–71).
In 1873–76 he was an assistant pastor in Arolsen, and later worked as a lecturer of New Testament exegesis at the University of Jena.
Bassermann was co-founder of the Allgemeinen evangelisch-protestantischen Missionsvereins, and from 1879 was editor of the "Zeitschrift für praktische Theologie" in collaboration with Rudolf Ehlers (1834–1908).