Hong Tal-son (Korean: 홍달손; Hanja: 洪達孫, 1415 – 25 November 1472) was a politician and soldier of the Joseon period of Korea.
He was part of the plots which instated King Sejo on his throne (계유정난).
As a result, he was nominated as the #10 in the 1st rank merit subject of 1453 and the #10 in the 2nd rank merit subject of 1455, with the title Prince Namyang (남양군).
[1] In 1459, he was promoted to Internal Prince Namyang 남양부원군 南陽府院君.
Under Sejo, Yejong and Seongjong, he occupied many governmental posts, Left State Councilor (좌위정) among them (1467–1472).