Surname มงคลทอง (มงคลทอง 
, Mongkontong , Mongkoltong ) , throughout the world, is a rare last name. The family name มงคลทอง is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, มงคลทอง is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mongkoltong, Mongkornthong, มงคลทอง, Mongkontong | Thailand |
Mongkholthong, Mongkholtong, Mongkhonthong, Mongkhontong, Mongkolthong, Mongkonthong, Mongkorntong, Mongkorthong, and Monglaythong