Thapar is an Indian surname.

Notable people bearing the surname Thapar include:

• Amul Thapar, Federal Judge of the United States Court of Appeals for the Sixth Circuit
• Amrita Thapar, model, Miss India 2005
• Anita Thapar, Welsh psychiatrist
• B. K. Thapar (1921-1995), Indian archaeologist
• Daya Ram Thapar (1894-1965), Indian Army medical officer
• Gautam Thapar (1960-), Indian businessman
• Karam Chand Thapar (1900–1963), founder of Thapar Group of companies
• Karan Thapar (1955–), television interviewer, son of General P. N. Thapar
• Kavya Thapar, Indian film actress and model
• L. M. Thapar (1930–2007), head of L. M. Thapar group of companies, son of Karam Chand Thapar
• Meenakshi Thapar (1984-2012), Indian actress
• Namita Thapar (born 1977), Indian businesswoman
• General Pran Nath Thapar (1906–1975), fifth Chief of Army Staff of the Indian Army
• Romesh Thapar (1922–1991), journalist and political commentator
• Romila Thapar (1931–), historian, sister of Romesh Thapar
• Sukhdev Thapar (1907–1931), Indian freedom fighter
• Valmik Thapar, conservationist and natural historian, son of Romesh Thapar
• Vishal Thapar, Indian sabre fencer

• Thapar family, Indian business family