Kǒng Jiǎ (Chinese: 孔甲; pinyin: Kǒng Jiǎ; Wade–Giles: K'ung‑Chia) was a king of ancient China, family name Sì (姒), the 14th ruler of the semi-legendary Xia dynasty. He possibly ruled for 31 years.

Kong Jia was a son of King Bù Jiàng and an unknown woman and grandson of King Xie of Xia.

His uncle was King Jiong of Xia and his cousin was King Jǐn.

He had many beautiful concubines. He fathered Gāo and was a grandfather of King Houjin.

In the Records of the Grand Historian, King Kong Jia didn't get the throne from his father, the 11th king of the Xia dynasty, because of him being superstitious and absurd. After his father died, his uncle and cousin became the 12th and 13th king of Xia kingdom. When they all died, Kong Jia finally ascended to the throne and became the 14th king of his country. He loved the supernatural, and, following his example, there were soon many supposed shamans and witches. The entire population turned to prayers and oracles instead of working.

According to the Bamboo Annals, Kong Jia lived in the Xia capital of Western River (西河).

In the third year of his reign, he hunted at the Fu Mountains (萯山) in Dongyang (東陽).

He was credited with composing the song "Eastern Sound" (東音), also known as the "Song of Broken Axe" (破斧之歌).