Aksu (also known as Ak-su, Akshu, Aqsu, Bharuka and Po-lu-chia. Uyghur: ئاقسۇ/; simplified Chinese 阿克苏, traditional Chinese: 阿克蘇, pinyin: Ākèsù) is a city in the Chinese province of Xinjiang and the capital of Aksu Prefecture. The name Aksu literally means "White Water", and is used for both the town and the river.

Aksu is a Turkish word, composed of the words ak (white) and su (water). It is the name of several localities and waterways in Asia and Europe.