Chonan

Chonan may refer to:


 * Chōnan, Chiba, a town in Japan
 * Cheonan, a city in South Korea
 * Battle of Chonan, a battle in the city during the Korean War
 * ROKS Cheonan (PCC-772), a South Korean corvette sunk in 2010
 * Chonan Gang, the Korean stage name of Tsuyoshi Kusanagi, Japanese actor/singer
 * Ryo Chonan (born 1976), Japanese mixed martial artist
 * Chonan languages, Patagonia