The 1840s was the decade that began on January 1, 1840 and ended on December 31, 1849.

Millennium: 2nd millennium
Centuries: 18th century19th century20th century
Decades: 1810s 1820s 1830s1840s1850s 1860s 1870s
Years: 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849
Categories: BirthsDeathsArchitecture
EstablishmentsDisestablishments

Events change

World leaders change

  1. Mohammad Shah Qajar, (b. 1810 – d. 1848) Shah from 1834 to 1848
  2. Nasser-al-Din Shah, 1848–1896

Births change

Deaths change