Thunderer may refer to:
- Thor, a nickname for the Norse God of Thunder is "the Thunderer"
- Colt M1877, a double-action revolver
- The Thunderer, a nickname for the British newspaper The Times
- HMS Thunderer, the name of a number of British naval vessels since the 18th century
- ST Thunderer, a British tug in service 1953–58
- the anglicised name of the god Pērkons in Latvian mythology
- the prophet Elijah (in Eastern Europe)
- Thunderer, a fantasy novel by Felix Gilman
- The Thunderer, a DC Comics villain in Metamorpho's Rogue's Gallery
- The Thunderer (Marvel Comics), a Marvel Comics character
- The Thunderer, a character in The 7th Portal
- The Thunderer, a march by John Philip Sousa
- "The Thunderer" (Dion song), a 2007 song about Saint Jerome
- The Thunderer (Wyoming), a mountain peak in Yellowstone National Park
- Thunderbird, a mythic creature in Native American culture
- Gromoboi (ship), two ships of the Russian Imperial Navy; "Gromoboi" is Russian for "Thunderer"
- Thunderer, a gun weapon from a popular game called Pixel Gun 3D.