In 2015, there were two individuals who served as the Speaker of the U.S. House of Representatives. From January to October, John Boehner held the position, and then on October 29, 2015, Paul D. Ryan was elected as the 54th Speaker of the United States House of Representatives, succeeding John Boehner. Paul Ryan served as the Speaker until January 2019. He was the youngest Speaker in nearly 150 years. For more information, you can refer to the Wikipedia page on the October 2015 election or the House.gov feature story about Paul Ryan's election.