Yongjia or Yung-chia may refer to:

• The former name for Wenzhou, a city in Zhejiang, China. Earliest usage of Wenzhou name began in about 760 AD; Yongjia name usage has continued.
• Yongjia County, in Zhejiang, China
• Yongjia School, Chinese school of thought during the Song Dynasty
• Yongjia Xuanjue, a Zen monk during the Tang Dynasty
• Yongjia (brachiopod), a brachiopod genus.
• Disaster of Yongjia (Chinese: 永嘉之乱) referred to events that occurred in 311 CE, when Wu Hu forces captured and sacked Luoyang, the Jin capital