Ruy Teixeira is an American political scientist and commentator who has written several books on various topics in political science and political strategy. He is most noted for his work on political demography, and particularly for The Emerging Democratic Majority (2002), which he co-wrote with John Judis, a book arguing that Democrats in the United States are demographically destined to become a majority party in the early 21st century. He writes and edits the weblog The Democratic Strategist.