On 13 November 2017, Ryan was elected President of the Senate, winning by 53 votes to 11 for Senator Peter Whish-Wilson of the Greens. He resigned his ministerial posts to take up the position. His predecessor Stephen Parry resigned from the Senate during the parliamentary eligibility crisis, after discovering he was a dual citizen of the United Kingdom. Ryan is the first former government minister to become President of the Senate since Doug McClelland (1983–1987), and the first person to resign from the ministry to take up the position. He took office at the age of 44, surpassing Kerry Sibraa (who was 49) as the youngest person to assume the presidency.