Demonte Colony 2 (also marketed as Demonte Colony II: Vengeance of the Unholy) is a 2024 Indian Tamil-language supernatural horror thriller film directed by R. Ajay Gnanamuthu, and produced by Bobby Balachandran under the banner of BTG Universal, together with Gnanamuthu Pattarai and White Nights Entertainment. The sequel to Demonte Colony (2015), Arulnithi stars alongside Priya Bhavani Shankar, Arun Pandian, Antti Jääskeläinen, Tsering Dorjee, Meenakshi Govindarajan, Sarjano Khalid and Archana Ravichandran.

In 2022, Venky Venugopal was announced as the director of the sequel. That November, however, Gnanamuthu replaced him, while he would still be part of the writing team. Principal photography commenced the same month and the first schedule was shot entirely in Hosur while the rest of the film was shot in Chennai. Filming wrapped by late-June 2023. The film has music composed by Sam C. S, cinematography handled by Harish Kannan and editing by Kumaresh D.

Demonte Colony 2 was initially scheduled to release in September 2023, but was postponed due to post production delays. The film was released theatrically on 15 August 2024, coinciding with Independence Day. The film received positive reviews from critics and audiences praising its screenplay and cast's performances. The film grossed ₹85 crore at the box office, making it one of the highest grossing Tamil films of 2024. Shortly after the film's success, a sequel was announced.