| Official Name: | Chai Nat |
| Native Name: | Thai: ชัยนาท |
| Settlement Type: | Town Municipality |
| Pushpin Map: | Thailand |
| Pushpin Mapsize: | 250px |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in Thailand |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Chai Nat province |
| Subdivision Type2: | District |
| Subdivision Name2: | Mueang Chai Nat district |
| Unit Pref: | Imperial |
| Population As Of: | 2006 |
| Population Total: | 14,469 |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Religions |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 15.1872°N 100.1283°W |
Chai Nat (Thai: ชัยนาท, in Thai pronounced as /t͡ɕʰāj nâːt/) is a town (thesaban mueang) in central Thailand, capital of Chai Nat province.[1] It covers the whole tambon tambon Nai Mueang and parts of Ban Kluai, Tha Chai and Khao Tha Phra, all in Mueang Chai Nat district. As of 2006 it had a population of 14,469.
The town is on the banks of the Chao Phraya River. The main road through the town is Phahonyothin Road (Highway 1). Bangkok lies 188 km to the south.[2]