Sima Lingji (Chinese: 司馬令姬) (fl.570s to 630s) was, briefly, an empress of the Xianbei-led Northern Zhou dynasty of China.
Emperor Xuan died in June 580, and the official Yang Jian, the father of Emperor Xuan's wife Empress Yang Lihua, seized power as regent.
The general Yuchi Jiong, suspicious of Yang's intentions, rose against Yang, and Empress Sima's father Sima Xiaonan and another general, Wang Qian (王謙), rose in support.
He soon had Emperor Jing and the other members of Northern Zhou's imperial Yuwen clan put to death.
Sima Lingji was not put to death, and, at a later unknown date, married the provincial governor Li Dan (李丹).