A tocsin is an alarm signal, given with a church bell. Usually this signal is given to tell people to assemble to face an imminent danger or threat.

Tocsin can also be,

• TOCSIN, the codeword for any reading on the Bomb Power Indicator after a nuclear strike on the United Kingdom during the Cold War
• Tocsin Bang, the codeword for any reading on the AWDREY instrument after a nuclear bomb strike on the United Kingdom during the Cold War
• Exercise Tocsin, a name for the nuclear attack simulation performed by the Government of Canada
• TOCSIN, a group of university students (at Harvard) against nuclear weapons, led by Todd Gitlin

• Tocsin, Indiana, a small town in Indiana in the United States

• the fourth and final movement of the Symphony No. 11 (1957) by Dmitri Shostakovich
• Tocsin (album), a 1984 album by goth rock band Xmal Deutschland
• Tocsin (Year of No Light album), a 2013 album by French shoegaze band Year of No Light

• The Tocsin, an early Australian socialist newspaper
• Tocsin (newspaper), a newspaper from Red Bluff, California; see California Digital Newspaper Collection
• Marin County Tocsin, a newspaper from Marin County, California; see California Digital Newspaper Collection
• Tehama Tocsin, an early name of the Chico Enterprise-Record newspaper in Tehama, California
• Tocsin News , or The Enterprise-Tocsin, a newspaper in Mississippi
• The Tocsin of Liberty, an anti-slavery newspaper from the US Liberty Party

• "The Tocsin", a poem by John Pierpont

This disambiguation page lists articles associated with the title Tocsin. If an internal link led you here, you may wish to change the link to point directly to the intended article.