I’ve made a list of academic centers which focus on the nonprofit sector, volunteerism and civil society issues:

Arizona State University
Center for Nonprofit Leadership and Management

Boston College
Center on Wealth and Philanthropy

Case Western Reserve University
Mandel Center for Nonprofit Organizations

Cass Business School
Centre for Charity Effectiveness

City University of New York
Center on Philanthropy and Civil Society, Graduate School and University Center

Cleveland State University
Center for Nonprofit Policy & Practice

Duke University
Center for the Study of Philanthropy and Voluntarism - Terry Sanford Institute of Public Policy

George Mason University
Nonprofit Management Studies

Georgetown University
Center for Public and Nonprofit Leadership - Georgetown Public Policy Institute

Georgia State University
Nonprofit Studies Program - Andrew Young School of Public Policy Studies

Grand Valley State University
Dorothy A. Johnson Center for Philanthropy and Nonprofit Leadership

Harvard University
Hauser Center for Nonprofit Organizations

Indiana University
The Center on Philanthropy at Indiana University

Johns Hopkins University
Center for Civil Society Studies

Louisiana State University - Shreveport
Institute for Human Services and Public Policy - College of Liberal Arts

New York University
Public and Nonprofit Management & Policy Program - Robert F. Wagner Graduate School of Public Service

New York University School of Law
National Center on Philanthropy and the Law

North Park University
Axelson Center for Nonprofit Management

Northwestern University
Center for Nonprofit Management - Kellogg School of Management

Portland State University
Institute for Nonprofit Management, Mark O. Hatfield School of Government

Queensland University of Technology
Centre of Philanthropy and Nonprofit Studies

Regis University
Nonprofit Management Program

Rockefeller Archive Center
Rockefeller Archive Center

Seattle University
Center for Nonprofit and Social Enterprise Management

Seton Hall University
Center for Public Service

Texas A&M University
Program in Nonprofit Management - Bush School of Government and Public Service

The New School
Graduate Management Programs - Nonprofit Management Program

University at Albany-SUNY
Center for Women in Government & Civil Society - Rockefeller College of Public Affairs and Policy

University of California-Berkeley
Nonprofit and Public Management Program-Haas School of Business

University of California-Los Angeles
Center for Civil Society

University of Delaware
Center for Community Research & Service

University of Maryland University College
Nonprofit & Association Management - The Graduate School of Management & Technology

University of Michigan
Nonprofit and Public Management Center, School of Social Work

University of Minnesota
The Public and Nonprofit Leadership Center, Humphrey Institute of Public Affairs

University of Missouri-Kansas City
Midwest Center for Nonprofit Leadership - Henry W. Bloch School of Business and Public Administration

University of Missouri-St. Louis
Nonprofit Management and Leadership Program

University of Pennsylvania
Center for Community Partnerships - Penn Program for Public Service

University of San Diego
Nonprofit Leadership & Management Program - School of Leadership & Education Sciences

University of San Francisco
Institute for Nonprofit Organization Management

University of Southern California
Center on Philantropy and Public Policy

University of St. Thomas
Center for Nonprofit Management

University of Texas at Austin
RGK Center for Philanthropy and Community Service

University of Washington
Nancy Bell Evans Center on Nonprofits and Philanthropy

University of Wisconsin-Milwaukee
Helen Bader Institute for Nonprofit Management

Virginia Tech
Nonprofit and Civil Society Program

York University
Nonprofit Management & Leadership Program - Schulich School of Business