Charles Branch Wilson (October 20, 1861 – August 18, 1941) was an American scientist, a marine biologist.

A year later he became a professor of biology and the head of the Science Department in Westfield, a position he held until his retirement in 1932.

During the summer of the same year, he worked at the Johns Hopkins University marine laboratory in Port Antonio, Jamaica; the first of several such field trips during his career.

He was encouraged in his work by the American biologist Waldo L. Schmitt, who joined the staff of the United States National Museum in 1915.

The second monograph dealt with the description of six new genera and fifteen new species of parasitic copepods from the museum's collections.

[4] Aside from studying copepods and teaching, Wilson also wrote papers on the embryology of amphibians, sipunculid, and nemertean worms; the biology and economic importance of dragonflies, damselflies, freshwater mussels, and aquatic hemipterans and coleopterans; as well as the results of the various surveys of the Bureau of Fisheries.