Nastja Kolar
| Country (sports) | Slovenia |
|---|---|
| Residence | Celje, Slovenia |
| Born | 15 July 1994 Celje |
| Height | 1.76 m (5 ft 9 in) |
| Plays | Right (two-handed backhand) |
| Prize money | $175,837 |
| Singles | |
| Career record | 352–208 |
| Career titles | 10 ITF |
| Highest ranking | No. 178 (3 November 2014) |
| Grand Slam singles results | |
| US Open | Q1 (2011, 2014) |
| Doubles | |
| Career record | 138–115 |
| Career titles | 16 ITF |
| Highest ranking | No. 140 (21 September 2015) |
| Team competitions | |
| Fed Cup | 0–7 |
Nastja Kolar (born 15 July 1994) is a Slovenian former professional tennis player. In her junior career, her highest ranking was fourth. Her highest WTA rankings were 178 in singles and 140 in doubles.
In 2023, Kolar was provisionally suspended from tennis competitions by the International Tennis Integrity Agency (ITIA) on corruption charges, and then later that year she was banned for life from professional tennis and fined $175,000 after the ITIA found her guilty of 25 match fixing offenses.