• [+] 1840 (24 C, 9 P)
• [+] 1841 (24 C, 9 P)
• [+] 1842 (24 C, 10 P)
• [+] 1843 (23 C, 10 P)
• [+] 1844 (25 C, 10 P)
• [+] 1845 (24 C, 9 P)
• [+] 1846 (25 C, 13 P)
• [+] 1847 (23 C, 12 P)
• [+] 1848 (25 C, 12 P, 1 F)
• [+] 1849 (26 C, 11 P)

A

• [+] 1840s architecture (11 C, 25 P)

B

• [+] 1840s births (10 C, 35 P)
• [+] 1840s books (10 C, 6 P)

C

• [+] 1840s by country (8 C, 1 P)

D

• [+] 1840s deaths (10 C, 6 P)
• [+] 1840s disestablishments (10 C)

E

• [+] 1840s establishments (18 C, 4 P)

F

• [+] Films set in the 1840s (27 P)

M

• [+] 1840s meteorology (2 C, 1 P)
• [+] 1840s in music (14 C)

R

• [+] 1840s racehorse births (4 C)
• [+] 1840s racehorse deaths (1 C)
• [+] 1840s in rail transport (10 C, 1 P)
• [+] 1840s riots (1 C, 6 P)

S

• [+] 1840s in science (12 C, 39 P)
• [+] Seminole Wars (4 C, 25 P)
• [+] 1840s ships (121 P)
• [+] 1840s in sports (10 C, 2 P)

T

• [+] 1840s in transport (13 C)

W

• [+] 1840s works (21 C, 1 P)

• 1840s

E

• European Potato Famine

F

• 1840s in fashion
• Frankfurt Parliament

G

• Geelong Keys
• German settlement in Australia
• Grosse Isle, Quebec

H

• Highland Potato Famine

L

• Legacy of the Great Irish Famine

S

• Second Carlist War
• Siamese–Vietnamese War (1841–1845)
• 1840s in sociology