| Official Name: | Maha Rat |
| Native Name: | มหาราช |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Ayutthaya |
| Subdivision Type2: | Seat |
| Subdivision Name2: | Hua Phai |
| Subdivision Type3: | Tambon |
| Subdivision Name3: | 12 |
| Subdivision Type4: | Muban |
| Subdivision Name4: | 58 |
| Population Total: | 23525 |
| Population As Of: | 2010 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 13150 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 1415 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 14.5342°N 100.5269°W |
Maha Rat (in Thai pronounced as /māhǎː râːt/) is a district (amphoe) in the northern part of Ayutthaya province in Thailand.
Originally the district was named Khwaeng Nakhon Yai. It was converted to an amphoe in 1914 and changed its name to Maha Rat in 1917.[1]
Neighboring districts are (from the north clockwise) Ban Phraek of Ayutthaya Province, Don Phut of Saraburi province, Bang Pahan of Ayutthaya Province, and Pa Mok, Mueang Ang Thong, and Chaiyo of Ang Thong province.
The district is divided into 12 sub-districts tambon, which are further subdivided into 58 villages muban. There are two sub-district municipalities (thesaban tambon). Maha Rat covers the whole tambon Hua Phai and Maha Rat. Rong Chang covers the whole tambon Nam Tao, Rong Chang, Chao Pluk, and Phit Phian. There are a further five tambon administrative organizations.
| No. | Name | Thai | Villages | Pop.[2] | |
|---|---|---|---|---|---|
| 1. | Hua Phai | หัวไผ่ | 6 | 2,156 | |
| 2. | Kathum | กะทุ่ม | 5 | 1,272 | |
| 3. | Maha Rat | มหาราช | 4 | 1,317 | |
| 4. | Nam Tao | น้ำเต้า | 4 | 1,295 | |
| 5. | Bang Na | บางนา | 5 | 1,973 | |
| 6. | Rong Chang | โรงช้าง | 4 | 1,820 | |
| 7. | Chao Pluk | เจ้าปลุก | 5 | 1,571 | |
| 8. | Phit Phian | พิตเพียน | 7 | 1,874 | |
| 9. | Ban Na | บ้านนา | 6 | 4,053 | |
| 10. | Ban Khwang | บ้านขวาง | 4 | 2,052 | |
| 11. | Tha To | ท่าตอ | 4 | 2,084 | |
| 12. | Ban Mai | บ้านใหม่ | 4 | 2,058 |