Fujiwara no Uchimaro (藤原内麻呂, 756 – November 13, 812) was a Japanese noble of the Nara period and early Heian period. He was the third son of the dainagon Fujiwara no Matate and thus a member of the Hokke. He reached the court rank of ju ni-i (従二位) and the position of udaijin, and posthumously of ju ichi-i (従一位) and daijō-daijin. He was also known as Go-Nagaoka-Daijin (後長岡大臣).