Yao Nai (姚鼐, pinyin: Yáo Nài; 1731–1815) was a scholar of the Qing Dynasty.
Born in Tongcheng (桐城), Anhui province, Yao Nai achieved the degree of Jinshi in 1763, and was appointed to the Hanlin Academy (翰林院). Later, he worked as official of several central administrative departments. Yao Nai was famous of his classical works (古文) and considered as a main figure of Tongcheng School.