Yi Jeong-am (; 1541 – September 10, 1600) was a Korean military official of the mid-Joseon Period. Life Yi Jeong-am passed the licentiate examination in the fall of 1558 and passed the regular literary examination in 1561 as one of the third-tier passers. Starting his career with the Third Copyist of Diplomatic Documents Bureau (승문원부정자), he served in various internal affairs and assistant section chiefs of several ministries. The following year, he served as an auditor of Jeolla Province (전라도도사), and then returned to the court to serve as assistant section chief of Ministry of Justice (형조좌랑). In 1569, he moved to Gyeonggi Provincial Government and became a drafter of the Chunchugwan (춘추관기주관). The following year, he was reappointed to the assistant section chief of Ministry of Justice to serve as a King's Editor (지제교). Then, he was moved to Section Chief of Ministry of Military (병조정랑) and dispatched to Gangwon Province as a secret royal inspector to inspect the disaster area. In 1571, he participated in the compilation of the Veritable Records of Myeongjong. In 1572, he was appointed to Second Assistant Master of Sungkyunkwan (성균관사예) and observed the Chundangdae examination. In June of the same year, he became a prefect of Yonan and organized his military service. After serving as prefect of Yonan, Jangdan and Pyongsan, he was appointed to the magistrate of Yangju in 1579. As the magistrate of Yangju, he reconstructed Dobong Seowon and county schools. He also reformed the rice field plans and implemented Uniform Land-Tax Law (대동법) in the entire area of Yangju. In 1583, he was selected as Jangnyeong (장령), Saseong (사성), and Jangakjeong (장악정) when Yi I recruited scholars and founded Chansucheong (찬수정). In 1587, he was designated as prefect of Dongnae to defend against the invasion of Japanese invaders. In 1591, he served as royal secretary (승지) and Councilor of Ministries of Public Works and Military affairs. In January 1592, he was the Councilor of Ministry of Personnel (이조참의). When King Seonjo took refuge in Pyongan Province, he attempted to follow him. But he was late and he was already out of office and had no duty. He tried to defend Kaesong with his younger brother, Yi Jeong-hyeong, but failed due to the collapse of the Imjin River defense line. In April, he entered the Hwanghae Province, became a Suppressor (초토사), recruited righteous army, and entered the Yonan Fortress with them.