Corwin was born in Norwell, Massachusetts in 1967, where he attended Norwell High School, then went on to spend his freshman year of college at the Eastern Nazarene College, in Quincy, Massachusetts. Later he attended Bridgewater State University in Bridgewater. Corwin has bachelor of science degrees in biology and anthropology. He conducted his graduate studies at the University of Massachusetts Amherst, obtaining a master of science in wildlife and fisheries conservation and doing work on bats and snakes. In 1999, Bridgewater awarded Corwin an honorary doctorate in public education.
Corwin was also certified as an Advanced Field Medical Specialist by the U.S. Army Academy of Health Sciences, Fort Sam Houston, Texas.
Corwin first experienced the tropical rain forests in 1984 in Belize. As an undergraduate, he became active in conservation of rain forests in Central and South America. He also participated in the youth action committee for the United Nations Environmental Program.
In 1993, Corwin addressed the General Assembly of the United Nations regarding the need to conserve neotropical rain forests. Corwin lectures on wildlife, gold mining, ecology and conservation to audiences throughout the United States.
In 1994, Corwin served as expedition naturalist for the documentary series titled The JASON Project, led by oceanographer Bob Ballard and sponsored in part by National Geographic. From 1997–1999 Corwin hosted a show for the Disney Channel titled Going Wild with Jeff Corwin. From 2001-2005 Corwin partnered with Animal Planet and Discovery Communications serving as host and executive producer of two series, The Jeff Corwin Experience from 2000 until 2003 and Corwin's Quest that ran for a single season in 2005 and 2006.
In 2003, Corwin appeared in an episode of the crime drama CSI: Miami. In the episode he played himself, portrayed as a former classmate of Eric Delko, played by Adam Rodriguez. Titled "Death Grip", Corwin helped detectives retrieve a human foot from inside a live crocodile. In 2003 Corwin hosted a television documentary for Animal Planet titled Giant Monsters.
In the spring of 2007, Corwin began a new TV show on the Travel Channel titled Into Alaska with Jeff Corwin. Also in 2007, Corwin was sponsored by CNN to be an environment correspondent for an Anderson Cooper 360 special called Planet in Peril, along with co-host Sanjay Gupta.
In 2009, Corwin partnered with Defenders of Wildlife to host the documentary series Feeling the Heat. In 2009 Corwin also hosted a television special for MSNBC with the same title of his book Future Earth: 100 Heartbeats. Corwin has been on expeditions to six of the seven continents—all except Antarctica.
In 2011, during the tsunami in Japan, Corwin was used as a geologist on MSNBC to help explain the tsunami. The same year, he voiced an alligator expert in an episode of The Hub's Pound Puppies. In 2012, Corwin starred in a Claritin commercial as himself.
From 2011 to 2016, Corwin hosted and was an executive producer on the ABC wildlife adventure series Ocean Mysteries with Jeff Corwin.
In October 2016, ABC began showing his current series, Ocean Treks with Jeff Corwin which involves ecology.
In filming a segment of CNN's Planet in Peril with Anderson Cooper at Phnom Tamao Wildlife Rescue Center near Phnom Penh, Cambodia on March 22 of 2007, Corwin was the victim of a playful elephant. This rough-play consisted of the elephant putting Corwin's elbow in its mouth and wrapping its trunk around his arm, and swinging him around. He yelled as the elephant shook its head, releasing and throwing Corwin into the shallow water in which they were standing. Corwin noted that the pain was so overwhelming that he nearly blacked out, and that his arm still does not work correctly. Corwin later posted the following summary of injuries that resulted:
Corwin lives in Marshfield, Massachusetts, with his wife Natasha and their two daughters: Maya Rose (b. July 6, 2003) and Marina (b. September 11, 2008).
He is of Hungarian and Romanian ancestry on his father's side.Going Wild with Jeff Corwin: Disney Channel 1997–1999.
The Jeff Corwin Experience: Animal Planet 2000–2003.
Giant Monsters: Animal Planet 2003.
Jeff Corwin Unleashed: Discovery Kids Channel 2003.
King of the Jungle: Animal Planet 2003–2004.
Corwin's Quest: Animal Planet 2005—2006.
Into America's West: Travel Channel 2008.
Into Alaska: Travel Channel 2007.
Feeling the Heat: Partnered with Defenders of Wildlife 2009.
Future Earth: 100 Heartbeats: MSNBC 2009.
Extreme Cuisine with Jeff Corwin: Food Network 2009–10.
Ocean Mysteries with Jeff Corwin: ABC 2011—2016.
Ocean Treks with Jeff Corwin: ABC 2016—2017.
In 2002, Corwin was named one of People Magazine´s 50 Most Beautiful People.
In 2004, Corwin won a Daytime Emmy for Outstanding Performer in a Children's Series for Jeff Corwin Unleashed.
In 2005, Corwin was nominated for the same award as in the previous year.
In 2016, Corwin won a Daytime Emmy award for Outstanding Lifestyle/Travel/Children's Series host for Ocean Mysteries with Jeff Corwin.