| Yaoki Ishii | |
| Birth Date: | 29 April 1977 |
| Birth Place: | Kamagaya, Chiba, Japan |
| Height: | 170cm |
| Plays: | Right-handed (two-handed backhand) |
| Careerprizemoney: | $142,174 |
| Singlesrecord: | 0–4 (ATP Tour) |
| Highestsinglesranking: | No. 207 (28 February 2000) |
| Australianopenresult: | Q3 (2000) |
| Frenchopenresult: | Q1 (2000) |
| Wimbledonresult: | Q2 (1998, 1999) |
| Usopenresult: | Q1 (1998, 2000, 2001) |
| Doublesrecord: | 0–4 (ATP Tour) |
| Highestdoublesranking: | No. 241 (18 September 2000) |
Yaoki Ishii (ja|石井 弥起; born 29 April 1977) is a Japanese former professional tennis player.[1]
A right-handed player from Kamagaya, Ishii won the singles title at the 1998 All Japan Tennis Championships and won a further two national championships in doubles.[2]
Ishii reached a career high ranking of 207 in the world while competing on the professional tour and featured in the qualifying draws of all four grand slam tournaments.[3]
In 2000 and 2001 he was a member of the Japan Davis Cup team, winning three of his five singles rubbers.