Jonathan Williams (c. 1752 – August 19, 1829), was a Welsh clergyman, schoolmaster and antiquarian writer.
He was born at Rhayader, some time between 1752 and 1754, the son of a draper, and had two brothers who also went into the church. He studied at Pembroke College, Oxford, going on to teach at the grammar school in Leominster on the English-Welsh border. He was also curate of nearby Eyton. At Leominster he got married, and had two daughters.