Kaihua County (Chinese: 开化县; pinyin: Kāihuà Xiàn) is a county under the jurisdiction of Quzhou city in Zhejiang Province of the People's Republic of China. It is located in the westernmost portion of Zhejiang, and is the source of the Qiantang River. The district's total area is 2224 square kilometers, and its population is 340,000 people. The district's postal code is 324300. The district government is located at 54 Jiefang Street, in the town of Chengguan.