Johann Friedrich Benzenberg (5 May 1777 – 7 June 1846) was a German astronomer, geologist, and physicist.

After studying theology at Herborn and Marburg, he travelled to Göttingen where he became interested in science through attending lectures by Georg Christoph Lichtenberg and Abraham Gotthelf Kästner.

Benzenberg obtained a PhD from the University of Duisburg in 1800 and became a professor of mathematics at the women's college of Düsseldorf in 1805.

[1] Benzenberg's interest in politics led him to write extensively on issues such as the constitution of Prussia.

[3] Later, in 1802 and 1804, Benzenberg helped prove the Earth's rotation by conducting experiments originally suggested by Isaac Newton; dropping balls from a height.