Following up on this post, and once again taking account of faculty changes since the fall 2014 PGR, here's an attempted update of the top (3.5 or higher) political philosophy programs for 2016-17, again by rough "clusters" of peer programs:

Group 1 (1)

University of Arizona

Group 2 (2-9)

Brown University

London School of Economics 

New York University

Oxford University

Princeton University

University of Michigan, Ann Arbor

University of Toronto

University of Virginia

Group 3 (10-22)

Australian National University

Columbia University (incl. Barnard)

Georgetown University

Harvard University

Queen's University, Kingston (Ontario)

Rutgers University, New Brunswick

Stanford University

University of California, Los Angeles 

University of California, San Diego

University of Chicago

University of North Carolina, Chapel Hill

University of Pennsylvania

Yale University

(Note:  Duke and Wash U/St. Louis were close to Group 3.)