| Thep Kasattri | |
| Princess of Ayutthaya | |
| Spouse: | Setthathirath |
| Dynasty: | Suphannaphum (by birth) Khun Lo (by marriage) |
| Father: | Maha Chakkraphat |
| Mother: | Suriyothai |
Thep Kasattri (Thai: เทพกษัตรีย์) or Thep Kasat Chao (Thai: เทพกษัตรเจ้า), Siamese princess, was the fifth child and third daughter of King Maha Chakkraphat and Queen Suriyothai. She married the King of Lan Xang, Setthathirath.