| Official Name: | Chon Daen |
| Native Name: | ชนแดน |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Phetchabun |
| Subdivision Type2: | Seat |
| Subdivision Type3: | Tambon |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Population Total: | 86086 |
| Population As Of: | 2000 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 67150 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 6702 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 16.1892°N 100.8597°W |
Chon Daen (in Thai pronounced as /t͡ɕʰōn dɛ̄ːn/) is a district (amphoe) in the western part of Phetchabun province, northern Thailand.
Chon Daen minor district (king amphoe) was created in 1917. It was upgraded to a full district in 1956.
Neighboring districts are (from the north clockwise) Wang Pong, Mueang Phetchabun, Nong Phai and Bueng Sam Phan of Phetchabun Province, Nong Bua of Nakhon Sawan province, and Dong Charoen and Tap Khlo of Phichit province.
The district is divided into nine sub-districts (tambons), which are further subdivided into 125 villages (mubans). There are three townships (thesaban tambons): Chon Daen covers parts of tambon Chon Daen, Dong Khui parts of tambons Dong Khui and Takut Rai, and Tha Kham covers parts of tambon Tha Kham. There are nine tambon administrative organizations.
| 1. | Chon Daen | ชนแดน | ||
| 2. | Dong Khui | ดงขุย | ||
| 3. | Tha Kham | ท่าข้าม | ||
| 4. | Phutthabat | พุทธบาท | ||
| 5. | Lat Khae | ลาดแค | ||
| 6. | Ban Kluai | บ้านกล้วย | ||
| 8. | Sap Phutsa | ซับพุทรา | ||
| 9. | Takut Rai | ตะกุดไร | ||
| 10. | Sala Lai | ศาลาลาย |