Arthur Paul Harper CBE (27 June 1865 – 30 May 1955) was a New Zealand lawyer, mountaineer, explorer, businessman and conservationist. He was simply known as AP or APH. He was born at his parents' house in Armagh Street, Christchurch, New Zealand in 1865.
He was the son of the MP and lawyer Leonard Harper. Bishop Henry Harper was his grandfather.
In 1935, Harper was awarded the King George V Silver Jubilee Medal. In the 1952 New Year Honours he was appointed a Commander of the Order of the British Empire for services to the community. He died in Wellington in 1955.