John Delaney (1811 – April 26, 1883) was an Irish-born civil servant, meteorologist and political figure in Newfoundland.
He represented Placentia and St. Mary's in the Newfoundland and Labrador House of Assembly from 1848 to 1852 and from 1855 to 1860 as a Liberal.
He played an active role in the passing of the Postal Act in 1851.
In 1860, he was named postmaster general; Delaney improved mail service in Newfoundland, introducing delivery to all parts of the island and door-to-door delivery in St. John's.
From 1857 to 1864 and from 1871 to 1873, Delaney, with assistance from his sons, recorded weather observations at St. John's and submitted them to the Smithsonian Institution as part of a record of North American climate.