King Jia of Dai
|Predecessor||King Youmiu of Zhao|
|Successor||none: Zhao annexed by Qin|
|Born||c. 250 BCE|
|Father||King Daoxiang of Zhao|

King Jia of Dai
|Predecessor||King Youmiu of Zhao|
|Successor||none: Zhao annexed by Qin|
|Born||c. 250 BCE|
|Father||King Daoxiang of Zhao|
King Jia of Dai, or perhaps more accurately Prince of Dai  (Traditional Chinese: 代王, Simplified Chinese: 代王) (reigned 227–223 BCE) was the last ruler of the state of Zhao during the waning days of the Warring Kingdoms period of China. His realm was merely a rump state that covered a fraction of the former Zhao territories.
Zhao Jia was the eldest son of King Daoxiang of Zhao, but because the concubine Chang Hou had found favour with King Daoxiang, upon succession the throne was passed on to Zhao Jia's younger brother, who became King Youmiu of Zhao.
Qin forces captured the Zhao capital of Handan in 228 BCE and captured King Youmiu. It is likely that Zhao Jia was not in Handan at 