Gashmeer Mahajani (born 8 June 1985) is an Indian actor who works in films, theatre and television. He is best known for his work in Marathi cinema and Hindi television. He is the son of actor Ravindra Mahajani who worked in Marathi films. He became 2nd runner-up of Fear Factor: Khatron Ke Khiladi 14.

Gashmeer made his silver screen debut with P. Som Shekar's Hindi film Muskurake Dekh Zara (2010), although only in 2015 did he achieve popularity, when Carry On Maratha, which was his Marathi film debut and Deool Band were released and also won him a Filmfare Award Marathi for Best Male Debut

He is the son of renowned and veteran Marathi actor Ravindra Mahajani. He married Gauri Deshmukh on 28 December 2014. On 21 December 2019, the couple had their first child, a boy, Vyom. His father died in 2023.

In 2010, Mahajani made his screen debut with a Bollywood film named Muskurake Dekh Zara as Vivek. This film was commercially unsuccessful. Gashmeer next joined Mumbai's Prithvi Theatre, wherein he enacted various roles and directed.

In 2015, Gashmeer debuted in the Regional Marathi Film Industry with his popular Marathi debut film Carry On Maratha as Maartand opposite actress Kashmira Kulkarni. In the same year, he also starred in another Marathi film Deool Band, where he portrayed the role of Dr. Raghav Shastri. This film saw some success globally.

In 2016, he played Raghu in Kanha and Aditya Rane in One Way Ticket. He also starred in another Bollywood film Dongri Ka Raja as Raja.

In 2017, he was seen as Ajay in Mala Kahich Problem Nahi.

In 2018, he did a crime horror show named Anjaan: Special Crimes Unit, an Indian paranormal investigative series, which aired on Discovery Jeet.