Hee-kyung Seo (Korean: 서희경, born July 8, 1986), also known as Seo Hee-kyung, is a former South Korean female professional golfer playing on the LPGA Tour and on LPGA of Korea Tour.

After winning three LPGA of Korea Tour major championships in 2009, Seo notched her first LPGA Tour triumph at the 2010 Kia Classic where she finished six shots ahead of Inbee Park.

Seo also came close at the 2012 Kraft Nabisco Championship, where she led by three strokes at one point, but bogeys on the last four holes would result in her finishing two strokes back of winner Sun Young Yoo.

On November 30, 2013, she married Junghoon Philip Kook (born 1979), an executive officer at DWS Asset Management based in Seoul, and gave a birth to their first son, Dohyun Philip Kook on August 15, 2014, on the Independence Day of Korea.

Seo officially retired from professional golf in November 2015 to spend more time with her family.