Zhao Mengjian (Chinese: 趙孟堅; Wade–Giles: Chao Meng-chien; 1199–1295), art name Yizhai (彝齋居士), was a Chinese painter and politician from Haiyan, Zhejiang.

He was a member of the Song dynasty who attained high rank at court as a Mandarin, and became president of the Hanlin Academy, retiring when the dynasty fell. He was known for his depictions of daffodils, plum blossom, orchids and bamboo.