John Nicholas was an English soldier and politician who sat in the House of Commons in 1656 and 1659.
Nicholas was of Chepstow and was a captain in Commonwealth army. He became governor of Chepstow in January 1651 and was added to the High Court of Justice on 25 June 1651.[1] In 1656, he was elected Member of Parliament for Monmouthshire in the Second Protectorate Parliament.[2] He was appointed steward to hold courts for conservation of the River Severn from 1656 to 1657 and was governor of Chepstow again in 1659.[1] He was re-elected MP for Monmouthshire for the Third Protectorate Parliament in 1659.[2] On the Restoration, he went abroad. He received a pardon and a pass as one of those whom the king wished to call home.[1]