| George Cosac | |
| Birth Date: | 26 January 1968 |
| Birth Place: | Constanța, Romania[1] |
| Plays: | Right-handed |
| Careerprizemoney: | US$ 86,518 |
| Singlesrecord: | 1–7 |
| Singlestitles: | 0 |
| Highestsinglesranking: | No. 265 (23 October 1995) |
| Doublesrecord: | 18–22 |
| Doublestitles: | 0 |
| Highestdoublesranking: | No. 170 (15 April 1991) |
| Team: | yes |
| Daviscupresult: | 9–14 |
George Cosac (born 26 January 1968) is a former tennis player from Romania. He competed in doubles at the 1992 Summer Olympics, together with Dinu Pescariu, but the pair was eliminated in the quarter-finals.[1] Cosac reached his highest singles ATP-ranking on 23 October 1995, when he became the number 265 of the world.
On 22 February 2013, he was elected president of the Romanian Tennis Federation.[2]
| Result | W/L | Date | Tournament | Surface | Partner | Opponents | Score | |
|---|---|---|---|---|---|---|---|---|
| Loss | 0–1 | Aug 1990 | Prague, Czechoslovakia | Clay |  Florin Segărceanu | 7–5, 4–6, 3–6 | ||
| Loss | 0–2 | Sep 1993 | Bucharest, Romania | Clay | Ciprian Porumb | 6–7, 6–7 | ||
| Loss | 0–3 | Sep 1998 | Bucharest, Romania | Clay | Dinu Pescariu | 6–7, 6–7 |