US MARINE CORPS
John G Demko Jr
September 4, 1945—March 2, 2007
CPL
Life Timeline
61 years1945
Born
September 4, 1945
US MARINE CORPS
Service Record
Vietnam War
Vietnam War
Conflict
CPL
2007
Passed Away
March 2, 2007
Service Record
Verified fields from cemetery source data.
Branch
US MARINE CORPS
Rank
CPL
War / Conflict
Vietnam War
Sourced from official cemetery data; last updated May 30, 2026.Learn more