- Apr 1 Robert McDowell, Mayor of Maryborough, Queensland (d. 1988)
- Apr 1 Stefanie Clausen, Danish diver (Olympic gold 10m platform 1920), born in Vesterbro, Denmark (d. 1981)
- Apr 2 Alfred Strange, English soccer right half (20 caps, 3 as captain; Sheffield Wednesday, 253 games), born in Ripley, England (d. 1978)
- Apr 2 Heinrich Besseler, German musicologist, born in Hörde, Germany (d. 1969)
- Apr 2 Roberto Arlt, Argentine writer (The Seven Madmen), born in Buenos Aires, Argentina (d. 1942)
- Apr 3 Camille Chamoun, President of Lebanon (1952-58), born in Deir el Qamar, Ottoman Empire (d. 1987)
Spencer Tracy (1900-1967)
Apr 5 American actor (Woman of the Year, Adam's Rib), born in Milwaukee
- Apr 6 Andres Sas, Belgian Peruvian composer, born in Paris (d. 1967)
- Apr 6 Leo Robin, American songwriter ("Thanks For The Memory"; "Diamonds Are A Girl's Best Friend"), born in Pittsburgh, Pennsylvania (d. 1984)
- Apr 7 Tebbs Lloyd Johnson, English race walker (Olympic bronze 50k 1952; oldest Olympic medal-winning athlete; 48 years and 115 days), born in Melton Mowbray, England (d. 1984)
- Apr 9 Allen Jenkins, American actor (Hey Jeannie, Top Cop, Girl Habit), born in Staten Island, New York (d. 1974)
- Apr 10 Jean Duvieusart, 36th Prime Minister of Belgium, born in Les Bons Villers, Belgium (d. 1977)
- Apr 11 Sándor Márai, Hungarian writer (A gyertyák csonkig égnek), born in Kassa, Hungary (d. 1989)
- Apr 13 Pierre Molinier, French painter and photographer, born in Agen, France (d. 1976)
- Apr 14 Salvatore Baccaloni, Italian opera singer and actor (Merry Andrew, Rock-a-Bye Baby), born in Rome, Italy (d. 1969)
- Apr 16 Polly Adler, Russian bordello proprieter and author (House is not a Home), born in Yanow, Russia (d. 1962)
- Apr 19 Richard Hughes, English writer (Fiction as Truth), born in Weybridge, Surrey (d. 1976)
- Apr 19 Roland Michener, 20th Governor General of Canada (1967-74), born in Lacombe, Alberta, Canada (d. 1991)
- Apr 20 Fred Raymond, Austrian composer, born in Vienna, Austria (d. 1954)
- Apr 20 Kees Verwey, Dutch painter and cartoonist, born in Amsterdam (d. 1995)
- Apr 23 Ary Verhaar, Dutch composer, born in The Hague, Netherlands (d. 1994)
- Apr 23 Harold French, British director and actor (The Cavalier of the Streets, Trio, Quartet), born in Lambeth, London (d. 1997)
- Apr 23 Henry Barraud, French composer, born in Bordeaux, France (d. 1997)
Jim Bottomley (1900-1959)
Apr 23 American Baseball HOF first baseman (MLB all-time single game RBI record [12] 1924; World Series 1926, 31; NL MVP & NL HR leader 1928; St. Louis Cardinals), born in Oglesby, Illinois
- Apr 23 Joseph Green, Polish-American filmmaker, born in Łódź, Poland (d. 1996)
- Apr 25 Hubert Miles Gladwyn Jebb, 1st Baron Gladwyn, British politician and diplomat, born in Firbeck Hall, England (d. 1996)
- Apr 25 Wolfgang Pauli, Swiss-American theoretical physicist (Pauli inhibition, Nobel 1945), born in Vienna, Austria-Hungary (d. 1958)
- Apr 26 Charles F. Richter, American physicist and seismologist (developed the Richter scale for measuring earthquake magnitude), born in Overpeck, Ohio (d. 1985)
- Apr 26 Hack Wilson, American Baseball Hall of Fame outfielder (MLB single season record 191 RBI 1930; NL HR leader 1926–28, 30; NL RBI leader 1929, 30; Chicago Cubs), born in Ellwood City, Pennsylvania (d. 1948)
- Apr 27 Walter Lantz, American cartoonist (Woody Woodpecker's creator), born in New Rochelle, New York (d. 1994)
- Apr 28 Bruno Apitz, German writer (Nackt unter Wölfen, born in Leipzig (d. 1979)
- Apr 28 Heinrich Müller, German Nazi, Director of the Gestapo (1939-45) and most senior Nazi official never captured or confirmed to have died, born in Munich, German Empire (d. ?)
- Apr 28 Jan Hendrik Oort, Dutch astronomer (hypothesized "Oort Cloud"), born in Franeker, Friesland (d. 1992)
- Apr 28 Kenneth Horne, British writer and playwright (Fools Rush In; The Coming-Out Party), born in Westminster, London, England (d. 1975)
- Apr 28 Maurice Thorez, French politician and secretary-general (French Communist Party), born in Noyelles-Godault, Pas-de-Calais, France (d. 1964)
About April 1900
How Old? 122 years old
Generation: Lost Generation
Leap Year: No