Joseph Peascod Harper ISO (March 1861 – 4 April 1951) was a British land surveyor, who served as the second Surveyor-General of the Federated Malay States (1919-1920).

Harper was an accomplished marksman and between 1905 and 1906 was the president of the Perak Rifle Association, in 1905 and 1906 he also won the Governor's Cup, and secured several other shooting trophies.

[1][3] On 1 August 1911 he was appointed as Deputy Surveyor General of the Federated Malay States.

[1][5] On 8 March 1919 he was appointed the Surveyor-General of the Federated Malay States, replacing Col. Hugh Milbourne Jackson.

Harper having previously been acting in that position whilst Jackson was absent on active service.