Surname ประชาชัย (ประชาชัย 
, Prachachai 
) , throughout the world, is a rare cognomen. The surname ประชาชัย is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Very seldom, ประชาชัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ประชาชัย | Thailand |
| Prachachai | United States, Thailand |