Nicholas "Nick" Groff (born April 19, 1980) is an American paranormal investigator, producer, musician, and TV personality. He was a co-investigator, executive producer, editor and cameraman on Ghost Adventures from seasons 1–10; he was the lead investigator for all 4 seasons of Destination America's reality series Paranormal Lockdown. 

Raised in New England, he's been fascinated with the paranormal since childhood, because of his passion for horror movies and some inexplicable experiences within his home and family. His strong vivacity led him to risk his own life twice within one year, he considers the first and gravest time a near-death experience that made him more sensitive to the supernatural.

He then moved to Las Vegas, NV, to graduate with a BA in Film at the University of Nevada (UNLV). During his senior year he got engaged with his high school sweetheart, Veronique Roussel, who also was his partner during his first attempts of paranormal research in Nevada. As their wedding DJ they hired Zak Bagans, who Nick befriended, afterwards the two of them told each other about their individual experiences with ghosts. Then, from working together as DJ and camera operator for weddings, they became a team of young paranormal investigators and in order to make a proper documentary about ghosts they needed to hire one more person. They chose Aaron Goodwin, who Nick had met years before during an UNLV film conference.

So, in 2004 the Ghost Adventures Crew was born, when, with no money but full of hopes, the three of them began to travel to the most haunted places in Nevada for their "Ghost Adventures: The Original Documentary" and later got the attention of critics and producers, which allowed them to create their own tv show on Travel Channel. "Ghost Adventures" was his first paranormal tv project, which he co-created, co-hosted and executive produced for 10 seasons (2008-2014).

He worked on many projects in different fields, from creating his own clothing brand, the "Phantom Collection", to writing his autobiographic book titled "Chasing Spirits: The Building of the Ghost Adventures Crew" (2012).

As a singer he released, in 2012, two music albums: "The Other Side" and "Spiritual War: Good vs Evil". Through his production company, Groff Entertainment, he produces some independent music artists besides of his tv projects.

Among his past film projects are the movie he wrote and directed, Malevolence (2004), and the tv shows he executive produced: Travel Channel's Vegas Stripped (2012) and Destination America's paranormal reality series Ghost Stalkers (2014).

His dedication to sports and wellness led him to open his own gym and in June 2013 he launched the "Drive Health & Fitness" in Methuen, MA, which he co-owned until August 2015.

Groff has also executive produced and starred in, along with Katrina Weidman , Destination America's paranormal realty series Paranormal Lockdown (2016–19), in which he was the lead investigator.