Chon Daen (Thai: ชนแดน, pronounced [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