Vaishali Rameshbabu, known as R Vaishali, is an Indian grandmaster born in Chennai in 2001. She won the World Youth Championship in the under-12 girls' section in 2012 and the under-14 section in 2015, became a Woman Grandmaster in 2018 and an International Master in 2021, and received the grandmaster title in 2024. Her younger brother is grandmaster R Praggnanandhaa.

Vaishali won the FIDE Women's Grand Swiss in 2023 and again in 2025, the first player to win the event twice. She was part of India's first women's team gold at the 2024 Chess Olympiad in Budapest. In 2026 she won the Women's Candidates Tournament with 8½/14, earning a Women's World Championship match against Ju Wenjun.