- Oct 1 George Coulouris, British actor (Runaway Bus), born in Manchester, England (d. 1989)
- Oct 1 Vladimir Horowitz, Russian-American classical pianist (Variations on a Theme from Carmen), born in Kiev, Russian Empire (now Ukraine) (d. 1989)
- Oct 4 Ernst Kaltenbrunner, Austrian nazi (SS/SD), born in Ried im Innkreis, Austria-Hungary (d. 1946)
- Oct 4 Bona Arsenault, French Canadian politician, historian and genealogist, born in Bonaventure, Quebec (d. 1993)
- Oct 5 Jimmy Ritz, American actor and comedian (Ritz Brothers-Blazing Stewardesses), born in Newark, New Jersey (d. 1985)
- Oct 5 M. King Hubbert, American geologist and geophysicist, born in San Saba, Texas (d. 1989)
- Oct 6 Ernest Walton, Irish physicist, Nobel Prize laureate (d. 1995)
- Oct 8 Lina Radke, German 800m runner (Olympic gold 1928), born in Karlsruhe, Germany (d. 1983)
- Oct 8 René Guillou, French organist and composer (L'Autre mère), born in Rennes, Brittany, France (d. 1958)
- Oct 9 Walter O'Malley, American baseball team owner (Dodgers), born in The Bronx, New York (d. 1979)
- Oct 10 Charles Théodore Henri Antoine Meinrad de Belgique, Count of Flanders, born in Brussels, Belgium (d. 1983)
- Oct 10 Vernon Duke [Vladimir Alexandrovich Dukelsky], American composer and songwriter ("Taking A Chance On Love"), born in Parafianovo, Russian Empire (d. 1969)
- Oct 12 Grayson L. Kirk, 14th President of Columbia University (1953-68), born in Jeffersonville, Ohio (d. 1997)
- Oct 12 Josephine Hutchinson, American actress (Story of Louis Pasteur), born in Seattle, Washington (d. 1998)
- Oct 13 Jens Bjerre, Danish composer, born in Aarhus (d. 1986)
- Oct 13 Patsy Moran, American actress (Children of the Wild), born in Philadelphia, Pennsylvania (d. 1968)
- Oct 16 Rex Bell [George Francis Beldam], American cowboy actor (Cowboys & Injuns) and 21st Lieutenant Governor of Nevada, born in Chicago, Illinois (d. 1962)
- Oct 16 Cecile de Brunhoff, French storyteller (d. 2003)
- Oct 17 Jerry Colona, comedian (Jerry Colona Show), born in Boston, Massachusetts
- Oct 17 Nathanael West, American novelist (Day of the Locusts)
- Oct 18 Ambrose Thibodeaux, American Cajun accordionist, also known as Ambrose Sam (d. 1995)
- Oct 18 Emile Enthoven, Dutch composer and lawyer, born in Amsterdam, Netherlands (d. 1950)
- Oct 19 Vittorio Giannini, American violinist, composer (The Medead), and educator (Curtis Institute, 1956-64), born in Philadelphia, Pennsylvania (d. 1966)
- Oct 19 Tor Johnson [Tore Johansson], Swedish wrestler and actor (Bride of the Monster), born in Kalmar län, Sweden (d. 1971)
- Oct 20 John Lodge, American actor (Witchmaker) and politician (79th Governor of Connecticut), born in Washington, D.C. (d. 1985)
- Oct 22 George Beadle, US biologist (Nobel 1958)
- Oct 22 Curly Howard {Jerome Lester Horwitz}, American vaudevillian actor and comedian (The Three Stooges), born in Brooklyn New York (d. 1952)
- Oct 23 Milford Dolliole, American pioneer jazz drummer, born in New Orleans, Louisiana (d. 1994)
Melvin Purvis
Oct 24 Melvin Purvis [Little Mel], American FBI agent that lead the manhunt for outlaws Baby Face Nelson, Pretty Boy Floyd and John Dillinger, born in Timmonsville, South Carolina (d. 1960)
- Oct 24 Charlotte Perriand, French architect and furniture designer (Unité d'habitation), born in Paris, France (d. 1999)
- Oct 25 Katharine Byron, U.S. Congresswoman, born in Detroit, Michigan (d. 1976)
- Oct 25 Harry Shoulberg, American expressionist painter, born in Philadelphia, Pennsylvania (d. 1995)
- Oct 28 Evelyn Waugh, English author (Brideshead Revisited, Scoop), born in London, England (d. 1966)
- Oct 29 Vivian Ellis, English composer, born in Hampstead, London (d. 1996)
- Oct 30 Konrad Friedrich Noetel, German composer, born in Posen (now Poznań) (d. 1947)
About October 1903
How Old? 118 years old
Generation: Greatest Generation
Leap Year: No