Na Jung-woong (Korean: 나정웅; born 31 October 1992) is a South Korean tennis player.

Na has a career high ATP singles ranking of 404 achieved on 16 September 2013. He also has a career high ATP doubles ranking of 966, achieved on 19 May 2014. He represents South Korea at the Davis Cup, where he has a W/L record of 0–1.

Outcome	Date	Tournament	Surface	Opponent	Score
Runner-up	5 May 2013	Seoul, South Korea	Hard	Daniel Nguyen	1–6, 4–6
Runner-up	24 November 2013	Bhopal, India	Hard	Sriram Balaji	5–7, 5–7
Winner	16 August 2015	Gimcheon, South Korea	Hard	Chung Yun-seong	6–3, 6–1
Runner-up	23 August 2015	Gimcheon, South Korea	Hard	Yusuke Watanuki	5–7, 3–6
Runner-up	6 September 2015	Anseong, South Korea	Clay	Cho Min-hyeok	7–6, 2–6, 4–6
Runner-up	9 June 2019	Daegu, South Korea	Hard	Hong Seong-chan	0–6, 3–6

Outcome	Date	Tournament	Surface	Partner	Opponent	Score
Runner-up	25 January 2015	Cairo, Egypt	Clay	Yun Jae-won	Maxime Janvier Kamil Majchrzak	2–6, 2–6

• Na Jung-woong at the Association of Tennis Professionals
• Na Jung-woong at the International Tennis Federation
• Na Jung-woong at the Davis Cup