1940 deaths

Polish writer (1865–1940)

Czech violinist and composer (1880–1940)

American stock trader (1877–1940)

Palestinian professional photographer and artist (1893–1940)

French physicist (1844-1940)

English sculptor, typeface designer, and printmaker (1882–1940)

Austrian member of Austrian empire council (1872-1940)

athletics competitor

German architect and archaeologist (1853–1940)

French organist and composer (1911-1940)

Belgian writer (1856–1940)

Greek journalist and writer

Marshal of the Polish Sejm

Swiss neurologist & pedagogue (1873-1940)

President of Paraguay (1888-1940)

French physicist and physician (1851–1940)

American socialite and Titanic survivor (1893-1940)

Finnish runner (1910–1940)

Albanian writer (1871-1940)

American nurse and activist (1867–1940)

British astronomer (1868-1940)

member of the Swiss Federal Council (1871-1940)

French theologian (1857-1940)

Austrian physician and psychologist (1868-1940)

French athlete (1874-1940)

Italian boxer (1904–1940)

Head of the House of Orléans (1874-1940)

Muslim scholar (1889–1940)

Norwegian engineer and businessman (1866-1940)

Mexican footballer (1909–1940)

German politician (1889-1940)

French racing cyclist, journalist and organiser of the first Tour de France (1865–1940)

Austrian physician (1860–1940)

Polish officer and aviator (1908-1940)

Ukrainian politician (1863-1940)

Irish-English mathematician (1860-1940)

Czech physician and writer (1882-1940)

thumb|The Doshan Tappeh Street, 1899 thumb|Mirror Hall, which he believed to be his best work. He painted it over a five-year period. Mohammad Ghaffari (; 29 September 1848 — 18 August 1940), better known as Kamal-ol-Molk (), was an Iranian painter and part of the Ghaffari family in Kashan, Qajar Iran.

actor, comedian, director, writer (1893–1940)

American actress (1883–1940)

Arab-American writer (1876-1940)

American astronomer (1878–1940)

Italian Catholic saint, priest, social advocate and religious founder (1872-1940)

Danish painter (1867-1940)

German art historian (1885-1940)

German mathematician (1881–1940)

British newspaper publisher and Viscount (1868-1940)

Indian revolutionary (1899-1940)

first female doctor in Malta

First person inocculated for rabies (1876-1940)

first Labour Prime Minister of New Zealand (1872-1940)

prime minister of the Kingdom of Serbs, Croats, and Slovenes (1863-1940)

English novelist and writer (1867–1940)

Soviet tank designer (1898–1940)

Swedish painter (1864-1940)

Mexican composer, violinist, and conductor (1899-1940)

Belarusian-Polish general

boxer (1911–1940)

British sailor (1869-1940)

Lithuanian-American chemist (1869-1940)