Xia (夏) details several meanings in the Chinese language and the History of China:

• The season of summer
• Xia (philosophy) is a Chinese philosophy similar (but not identical) to the chivalrous code of European knights.
• A Chinese family name
• The Xia Dynasty
• The majority ethnic group later known as the Han Chinese after the Han Dynasty. Refer to Huaxia.
• The "Empire" of Xia of the Hunnic Tiefu during the era of Sixteen Kingdoms in China.
• The Xia regime by Dou Jiande during the turbulent transition from the Sui Dynasty to the Tang Dynasty.
• The Western Xia of the Tanguts.
• In computers, Xia file system was a file system developed for the Linux operating system together with the Ext2 file system.