John Griffith (died 1609) was a Welsh politician who sat in the House of Commons from 1571 to 1609.
In 1559 he took over the office of Regius professor of civil law at Oxford, which he held till 1566.
He was also Principal of New Inn Hall from 1561 to 1564 after which he was admitted to Doctors' Commons.
[2] He married Margaret, the daughter of Rhys Thomas of Aber and widow of Edward Griffith of Penrhyn.
They had four sons, including Nicholas and William Griffith, and 3 daughters.