Katō Yasunori (加藤泰令, April 12, 1838 – February 23, 1913) was a Japanese aristocrat and the 9th (and final) ruler and the governor of the Niiya Domain in Iyo.

[1][2] Yasunori was born as the eldest son of Katō Yasutada.

On December 20, 1862, he succeeded his father as the head of the family due to his retirement.

In June 1864, he organized a peasant gun squad called Gosogumi.

In September 1871, he moved to Tokyo and he was granted the title of Viscount on July 8, 1884.