Thia (disambiguation)

Thia may refer to:


 * Thia, a genus in which the thumbnail crab is the only extant species
 * Tegeticula, a prodoxid moth genus invalidly described as Thia by H. Edwards in 1888
 * 405 Thia, an asteroid
 * Thia Megia (born 1995), a contestant in the 10th season of American Idol
 * Henry Thia (born 1952), Singaporean actor and comedian
 * Shawn Thia (born 1995), Singaporean actor