Last name ประสิต (Prasit 
, ประสิต ) , in the entire world, is quite a rare family name. The last name ประสิต is habitual in South-eastern Asia, particularly Thailand, where it is quite a rare surname, Malaysia, where it is a rare surname, and Singapore, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in Thailand, Malaysia, and China. Predominantly, ประสิต is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Prasit | Thailand, Indonesia, India, United States, Nepal |
| ประสิต | Thailand |