Born in 1981, Archey was raised in San Mateo, California by his grandparents. Being an only child, Archey was an introvert which didn't help with making friends in school. Archey played baseball and football during his first two years of high school. While Archey has a relationship with his mom though she moved around quite often. Archey had very little contact with his father who passed when Lamon was 20 years old. After high school, Archey worked as a carpenter installing floors for two years. He then moved to Los Angeles with his uncle. Upon birth, Archey's mother had given him a different name but his grandfather felt it sounded like a girl's name so it was changed to Lamon. Archey has 12 tattoos.
Archey began dating model and Actress Mercedes Cornett in February 2006. The duo had previously met at a fashion show in 2003 and kept in contact. The couple became engaged in 2010. They share a son Caden (born July 9, 2009) and daughter Gaia (born May 29, 2012). Archey has another son, Machiah (born September 8, 2002) from a previous relationship.
Living in Los Angeles, Archey took up modeling after he was scouted at a job fair. He credits modeling with helping him break out of his shell. He was later advised by manager Michael Bruno to get into acting classes so he could get a gig on a soap. After about two years of acting classes with no results, Archey was ready to give up when he booked two under-five roles on Days of Our Lives. In December 2012, Archey was cast in the recurring role of Mason Wilder on The Young and the Restless. Archey vacated the role in early 2014. In 2016, Archey returned to Days of Our Lives in the newly created contract role of Eli Grant. He appeared onscreen in February 2017. In March 2017, Archey appeared in the television film Can't Buy Love.