James Arthur International Member (elected 2014)
University of Toronto
Primary: 11, Mathematics

Michael Artin Member (elected 1977)
Massachusetts Institute of Technology
Primary: 11, Mathematics

Emil Artin Resigned 1961 (elected Member 1958)
March 3, 1898 - December 20, 1962

Michael Aschbacher Member (elected 1990)
California Institute of Technology
Primary: 11, Mathematics

Berhane Asfaw International Member (elected 2008)
Rift Valley Research Service
Primary: 51, Anthropology

N. W. Ashcroft Member (elected 1997)
November 27, 1938 - March 15, 2021

Orley C. Ashenfelter Member (elected 2018)
Princeton University
Primary: 54, Economic Sciences

Arthur Ashkin Member (elected 1996)
September 2, 1922 - September 21, 2020

Abhay V. Ashtekar Member (elected 2016)
The Pennsylvania State University
Primary: 13, Physics
Secondary: 12, Astronomy

G. Gilbert Ashwell Emeritus (elected 1979)
July 16, 1916 - June 27, 2014

Richard A. Askey Member (elected 1999)
June 4, 1933 - October 9, 2019

Brigitte A. Askonas International Member (elected 2007)
April 1, 1923 - January 9, 2013

Richard N. Aslin Member (elected 2013)
Yale University
Primary: 52, Psychological and Cognitive Sciences

Gregory P. Asner Member (elected 2013)
Arizona State University
Primary: 64, Human Environmental Sciences
Secondary: 63, Environmental Sciences and Ecology

Alain Aspect International Member (elected 2008)
Institut d'Optique
Primary: 13, Physics
Secondary: 33, Applied Physical Sciences

David E. Aspnes Member (elected 1998)
North Carolina State University
Primary: 33, Applied Physical Sciences
Secondary: 13, Physics

Allen V. Astin Member (elected 1960)
June 12, 1904 - January 17, 1984

Edwin Astwood Member (elected 1957)
December 29, 1909 - February 17, 1976

Bishnu S. Atal Member (elected 1993)
University of Washington
Primary: 31, Engineering Sciences
Secondary: 34, Computer and Information Sciences

Susan Athey Member (elected 2012)
Stanford University
Primary: 54, Economic Sciences

Michael Atiyah International Member (elected 1978)
April 22, 1929 - January 11, 2019

Richard C. Atkinson Member (elected 1974)
University of California, San Diego
Primary: 52, Psychological and Cognitive Sciences

George F. Atkinson Member (elected 1918)
January 26, 1854 - November 14, 1918

Scott Atran Member (elected 2022)
Artis International
Primary: 51, Anthropology
Secondary: 52, Psychological and Cognitive Sciences

Giuseppe Attardi Member (elected 1984)
September 14, 1923 - April 5, 2008

Tanya M. Atwater Member (elected 1997)
University of California, Santa Barbara
Primary: 15, Geology
Secondary: 16, Geophysics

Brian F. Atwater Member (elected 2007)
U.S. Geological Survey
Primary: 15, Geology
Secondary: 16, Geophysics

Joseph C. Aub Member (elected 1957)
May 13, 1890 - December 30, 1973

Charlotte Auerbach International Member (elected 1970)
May 14, 1899 - March 17, 1994

Norman R. Augustin Public Welfare Medalist (awarded 2006)
Lockheed Martin Corporation

Robert J. Aumann Member (elected 1985)
The Hebrew University of Jerusalem
Primary: 54, Economic Sciences
Secondary: 11, Mathematics

Gerald D. Aurbach Member (elected 1986)
March 24, 1927 - November 4, 1991

K. Frank Austen Member (elected 1974)
March 14, 1928 - June 23, 2023

Robert H. Austin Member (elected 1999)
Princeton University
Primary: 13, Physics

David H. Auston Member (elected 1991)
University of California, Santa Barbara
Primary: 31, Engineering Sciences
Secondary: 33, Applied Physical Sciences

Robert Austrian Member (elected 1979)
April 12, 1916 - March 25, 2007

Frederick M. Ausubel Member (elected 1994)
Harvard University
Primary: 25, Plant Biology

G. F. J. A. Auwers International Member (elected 1883)
September 12, 1838 - January 24, 1915

Mary Ellen Avery Emeritus (elected 1994)
May 6, 1927 - December 4, 2011

Oswald Avery Member (elected 1933)
October 21, 1877 - February 20, 1955

Artur Avila International Member (elected 2019)
University of Zurich
Primary: 11, Mathematics

John C. Avise Member (elected 1991)
University of California, Irvine
Primary: 27, Evolutionary Biology
Secondary: 63, Environmental Sciences and Ecology

Phaedon Avouris Member (elected 2017)
International Business Machines Corporation
Primary: 33, Applied Physical Sciences
Secondary: 14, Chemistry

David D. Awschalom Member (elected 2007)
The University of Chicago
Primary: 33, Applied Physical Sciences
Secondary: 13, Physics

Richard Axel Member (elected 1983)
Columbia University
Primary: 41, Medical Genetics, Hematology, and Oncology

Julius Axelrod Member (elected 1971)
May 30, 1912 - December 29, 2004

Robert Axelrod Member (elected 1986)
University of Michigan
Primary: 53, Social and Political Sciences

W. Ian Axford International Member (elected 1983)
January 2, 1933 - March 13, 2010

John D. Axtell Member (elected 1982)
February 5, 1934 - December 2, 2000

Francisco J. Ayala Rescinded 2021 (elected Member 1980)
March 12, 1934 - March 5, 2023