John N. Decore MP QC (born Ivan Dikur; April 9, 1909 – November 11, 1994) was a barrister, lawyer, teacher, and politician from Alberta, Canada. Decore was born Ivan Dikur on a farm 5 miles (8.0 km) west of Andrew, Alberta in a district called Sniatyn to Ukrainian immigrant parents Nykola and Hafia (nee Kostiuk). Nykola arrived in Canada in 1898 at the age of ten; Nykola was Hafia's second husband. Hafia died when John was only four years old he did not along with his stepmother. Decore's son Laurence was mayor of Edmonton and leader of the Opposition in the Legislative Assembly of Alberta.