Robert Johnson (c.1537 – 1622) was an English politician who sat in the House of Commons from 1597 to 1614.
He was the eldest son of William Johnson of Crawley, Buckinghamshire.
In 1597, he was elected Member of Parliament for Monmouth Boroughs where he was named to committees on weights and measures and pawnbrokers.
He was re-elected MP for Monmouth in 1601 and took a strong line in parliament then on temperance issues.
He proposed, for example, on 3 November that innkeepers who failed to restrain habitual drinkers should suffer corporal punishment.