John McCahon was born in Ireland on November 3, 1827. In 1848, McCahon moved to the United States. While he is now known for his photography, McCahon’s traditional trade was carpentry. He became engrossed in the photography business between 1861 and 1888. McCahon operated a photography studio at 47 North Third Street in Newark, with the assistance of his daughter Blanche, who continued to operate the studio until her death in 1944. In addition to his daughter, McCahon had a son, Dr. J.H. McCahon, who was a dentist in Newark for 45 years. John McCahon died on June 18, 1894 from complications of a lingering illness.
- Obituary from the John W. Parkinson Collection, September 27, 1994.
- Obituary from the John W. Parkinson Collection, December 20, 1950.
- “Gone to His Reward,” Newark Advocate, September 24, 1896.