| Hee-seok Chung | |
| Residence: | Seoul, South Korea |
| Birth Date: | 1977 1, df=yes |
| Plays: | Right-handed |
| Careerprizemoney: | US$34,345 |
| Singlesrecord: | 6–3 |
| Singlestitles: | 0 |
| Highestsinglesranking: | No. 482 (May 27, 2002) |
| Doublesrecord: | 6–5 |
| Doublestitles: | 0 |
| Highestdoublesranking: | No. 477 (November 20, 2006) |
Chung Hee-seok (born January 29, 1977) is a former professional South Korean tennis player.
Chung reached his highest individual ranking on the ATP Tour on May 27, 2002, when he became World number 482. He played primarily on the Futures circuit and the Challenger circuit.
Chung was a member of the South Korean Davis Cup team, posting a 7–3 record in singles and a 7–5 record in doubles in thirteen ties played.
| Legend (singles) | |
|---|---|
| Grand Slam (0–0) | |
| Tennis Masters Cup (0–0) | |
| ATP Masters Series (0–0) | |
| ATP Tour (0–0) | |
| Challengers (0–0) | |
| Futures (6–3) |
| Outcome | No. | Date | Tournament | Surface | Opponent | Score | |
|---|---|---|---|---|---|---|---|
| Winner | 1. | 29 May 2000 | Seoul, South Korea | Hard |  Lee Seung-hoon | 6–3, 6–3 | |
| Runner-up | 1. | 28 May 2001 | Seoul, South Korea | Clay | Lee Seung-hoon | 4–6, 4–6 | |
| Winner | 2. | 4 June 2001 | Seoul, South Korea | Clay | Kim Dong-hyun | 6–4, 7–6 | |
| Winner | 3. | 13 May 2002 | Seoul, South Korea | Clay | Kim Dong-hyun | 6–4, 6–3 | |
| Runner-up | 2. | 28 April 2003 | Seoul, South Korea | Clay |  Jan Masik | 7–6, 3–6, 1–6 | |
| Winner | 4. | 9 August 2004 | Makassar, Indonesia | Hard | Suwandi Suwandi | 7–6, 6–3 | |
| Runner-up | 3. | 8 August 2005 | Makassar, Indonesia | Hard | Kwon Oh-hee | 6–7, 1–6 | |
| Winner | 5. | 7 August 2006 | Bangkok, Thailand | Hard | Chen Ti | 6–4, 6–0 | |
| Winner | 6. | 14 August 2006 | Nonthaburi, Thailand | Hard |  Nick Lindahl | 6–1, 6–1 |