Joella Gerstmeyer Yoder (born 1944) is a historian of science.
She is an expert in the work of Christiaan Huygens.
Yoder gained her Ph.D. in 1985 from the University of Wisconsin.
In 1986 she embarked on the project of cataloguing the manuscripts and letters of Huygens, many of them collected at the University of Leiden.
It would take her over a quarter of a century to complete this cataloguing project.