Samuel Haliday or Hollyday (1685–1739) was an Irish Presbyterian non-subscribing minister, to the “first congregation” of Belfast.

He was son of the Rev. Samuel Haliday (or Hollyday) (1637–1724), who was ordained presbyterian minister of Convoy, County Donegal, in 1664; then moved to Omagh in 1677; left for Scotland in 1689, where he was successively minister of Dunscore, Drysdale, and New North Church, Edinburgh; and returning to Ireland in 1692, became minister of Ardstraw, where he continued till his death. Samuel, the son, was born in 1685, probably at Omagh, where his father was then minister.

In 1701 he entered Glasgow College, enrolled among the students of the first class under John Loudon, professor of logic and rhetoric. He graduated M.A., and went to Leiden University to study theology (19 November 1705)