Lin Yu-an (Chinese: 林昱安; pinyin: Lín Yù'ān; born September 22, 1988) is a Taiwanese swimmer, who specialized in individual medley events.

[1] Lin qualified for the men's 400 m individual medley at the 2004 Summer Olympics in Athens, by clearing a FINA B-cut of 4:33.10 from the National University Games in Taipei.

[2][3] He participated in the first heat against three other swimmers Saša Imprić of Croatia, Andrew Mackay of the Cayman Islands, and Nikita Polyakov of Uzbekistan.

He raced to third place by a 9.74-second margin behind Impric in 4:41.76.

Lin failed to advance into the top 8 final, as he placed thirty-fifth overall on the first day of preliminaries.