Jonathan Andrew Eisen (born August 31, 1968)[5] is an American evolutionary biologist, currently working at University of California, Davis.

[7][8][9][10][11] Eisen completed his undergraduate studies at Harvard College in 1990, earning an AB degree in biology.

[12] He graduated as a Doctor of Philosophy from Stanford University in 1998 with a thesis on the evolution of DNA repair genes, proteins, and processes in 1998, supervised by Philip Hanawalt.

Eisen together with Nick Barton, Derek E.G. Briggs, David B. Goldstein, and Nipam H. Patel is an author of the undergraduate textbook, Evolution, that integrates molecular biology, genomics, and human genetics with traditional evolutionary studies.

Examples include a New York Times article on the Genomic Encyclopedia of Bacteria and Archaea in 2009[19] and extensive coverage of work on searching for a "fourth domain" of life.