Jeong Keun-woo (Korean: 정근우, Hanja: 鄭根宇; born October 2, 1982) is a former second baseman and shortstop who last played for the SK Wyverns, Hanhwa Eagles, and LG Twins in the Korea Baseball Organization.

He led the attack alongside future pro baseball stars Choo Shin-soo, Kim Tae-kyun and Lee Dae-ho, batting .333 with 3 RBIs as a starting second baseman.

After the 2006 KBO season, Jeong was selected for the South Korea national team, and won a bronze medal at the 2006 Asian Games in Doha, Qatar.

As a member of the South Korea national team, he competed in the 2007 Asian Baseball Championship and 2008 Final Olympic Qualification Tournament.

In the team's third game of round-robin play against Canada, he smacked a solo home run off Mike Johnson in the third inning that held up for a 1-0 win for South Korea.