Lin Xiyu (born 25 February 1996), also known as Xi Yu Lin, is a Chinese professional golfer.
Lin turned professional in 2011 and began playing on the China LPGA Tour. She has won seven times on the CLPGA. She began playing on the Ladies European Tour in 2013 and has two wins on the tour the Sanya Ladies Open in 2014 and 2015. She began playing on the LPGA Tour in 2014 with a best finish of T-5 at the 2015 Blue Bay LPGA.
Lin has made multiple holes-in-one on the LPGA Tour.
Lin competed at the 2016 Summer Olympics, finishing 38th.