More than 600 people nationwide have been charged with defying the 10pm to 4am curfew.
Prayuth Phetchakhun, deputy spokesman of the Office of the Attorney General (OAG), said prosecutors have indicted a total of 623 people for violating the curfew.
On March 26, the government invoked the emergency decree to make people stay at home.
There is also a ban on gatherings causing public disturbances.
Violators are liable to a jail term of up to two years and/or a fine of up to 40,000 baht.
A court in Ayutthaya sentenced violators to 2-4 months in jail for illegal gatherings while a court in Pathum Thani handed down a 15-day jail term to one violator, he said.
He added that most violators are those who defied the curfew banning people leaving home from 10pm to 4am. Most were aged between 20-35, he said.
