By Series - Dictionary of World Biography: Twentieth Century
- Alfred Wegener
- Alger Hiss
- Alice Paul
- Alice Walker
- Althea Gibson
- Alvar Aalto
- Amelia Earhart
- Amy Lowell
- André Breton
- André Gide
- André Malraux
- André-Gustave Citroën
- André-Louis Danjon
- Andrei Nikolayevich Tupolev
- Andrei Sakharov
- Andrés Segovia
- Andrew Mellon
- Andrew Wyeth
- Andy Warhol
- Aneurin Bevan
- Anita Loos
- Ann Richards
- Anna Akhmatova
- Anna Pavlova
- Anne Frank
- Anne Sexton
- Anthony Eden
- Anton von Webern
- António Egas Moniz
- Antonio Gaudí
- Antonio Gramsci
- Anwar el-Sadat
- Arnold Gesell
- Arnold Schoenberg
- Arnold Toynbee
- Arthur Balfour
- Arthur Holly Compton
- Arthur Miller
- Arturo Toscanini
- Atatürk
- Athol Fugard
- August Krogh
- August Strindberg
- Auguste Perret
- Augustus John
- Ayatollah Khomeini
- B. F. Skinner
- Babe Ruth
- Bal Gangadhar Tilak
- Barbara Jordan
