| Nilay Erkal | |
| National Team: | Turkey |
| Education: | Dalhousie University |
| Birth Date: | 1 February 1999 |
| Birth Place: | Denizli, Turkey |
| Strokes: | Freestyle |
| Club: | Galatasaray Sports Club |
| Collegeteam: | Dalhousie University Varsity Women's Swimming |
| Coach: | Lance Cansdale |
Nilay Erkal (born 1 February 1999) is a Turkish long-distance swimmer. She is a member of Galatasaray Athletics. She is also studying in Pharmacy School at Yeditepe University.
Nilay Erkal was born in Denizli, Turkey in 1999. She started swimming at age 8 in Marmaris, Muğla. In 2011, she became Turkish champion in the 200 m butterfly event of 12-year age category.
She won the 2015 Bosphorus Cross Continental Swim in the women's category, and became the first again in 2016 with a time of 0:52:38. She finished the same event in 2017 with a time of 0:55:01 as runner-up in the women's category, and first in the 14–18 years-age category.
In July 2016, she finished 7500m in 9th place in the FINA World Junior Open Water Swimming Championships Hoorn/Netherlands
In 2016 Marathon Swimming Qualification Tournament, she finished 10 km with the time of 2:02:26.8.
In December 2017, she won the bronze medal in 800 m freestyle event of the Vancouver Pacific Swim competition in Canada.
She is the three-time winner of the Meis–Kaş Swim. In 2019, she improved her own course record by five minutes to 1:32.