- Arnold M. Goldman and Co., Inc.23
- Arnold, Benedict, 1741-18011
- Arnold, C. D. (Charles Dudley), 1844-192764
- Arnold, Eddy, 1918-20081
- Arnold, Edwin, Sir, 1832-19041
- Arnold, Frank A. (Frank Atkinson), 1867-1
- Arnold, Leslie P., 1894-19611
- Arnold, Maris1
- Arnold, Samuel1
- Arnold, Thurman Wesley, 1891-19692
- Arnor, Anders1
- Arnoux, Abbe de1
- Aronin, Jeffrey Ellis, 1927-2
- Aronowitz, Al9
- Aronowitz, Rachel1
- Aronowitz, Stanley3
- Aronson, Albert H1
- Aronson, Fannie1
- Aronson, Henry M1
- Arostegui, Consuelo2
- Arranmore (Musical group)1
- Arrighi, Louis1
- Arrigo, Joseph1
- Arrowbrook Garden Corp.3
- Arrowsmith, William, 1924-19921
- Arsenian, Deana1
- Arsenian, Deana, 1958-4
- Arsmith Realty Co., Inc.1
- Art Institute of Chicago2
- Art Stove Company1
- Artaud, Antonin, 1896-19481
- Artcourt Realty Co.1
- Arthold Realty Co.1
- Arthur1
- Arthur & Bonnell1
- Arthur Eckstein, Inc.1
- Arthur Hardgrove Co.15
- Arthur, George K., 1899-19851
- Arthur, Jim1
- Arthur, Paul, 1945-1
- Arthur, T. S. (Timothy Shay), 1809-18853
- Artis, John3
- Artpaul Realty Co., Ltd.10
- Artra (Musical group)1
- Arts Council of Great Britain3
- Arts Park9
- Arts and Entertainment Network1
- Artsis, Jerome M.3
- Arvey, Jacob M. (Jacob Meyer), 1895-19771
- Arwin Construction Corp.1
- Aryeetey, Ernest, 1955-1
- Arzt, George1
- Asai, Woodrow Wilson1
- Asbury, Edith Evans, 1910-20081
- Asch, Berta2
- Asch, Stephen1
- Aschenbrenner, Michael, 1949-1
- Ascher, Charles S. (Charles Stern), 1899-19801
- Ascot Estates, Inc.1
- Asekoff, L. S. (Louis S.), 1939-1