Sir John Vaughan SL (14 September 1603 – 10 December 1674), of Trawsgoed, was a justice in the Kingdom of England.
He was born in Ceredigion, Wales, the eldest of eight children of Edward Vaughan and his wife Letitia (Lettic) Stedman of Strata Florida, and was educated initially at The King's School, Worcester between 1613 and 1618, when he was admitted to Christ Church, Oxford.
He was a moderate royalist, helping to prosecute William Laud and write the Triennial Acts, but refused to support a bill of attainder against Thomas Wentworth, saying it was unconstitutional.
[3] After the English Restoration, Vaughan returned to the House of Commons in 1661, representing Cardiganshire in the Cavalier Parliament.
Vaughan died on 10 December 1674 at Serjeant's Inn, and was buried twelve days later at Temple Church, with Edward Stillingfleet speaking at his funeral.