Colonel Mangaradja Sinta Mardame Sinaga (1924 – 28 May 2000) was a politician and military person who served as the Regent of North Tapanuli from 1968 until 1979.

He graduated in 1940 and planned to study at the Meer Uitgebreid Lager Onderwijs (Junior High School), but was halted due to the Japanese occupation of the Dutch East Indies.

After the recognition of the independence of Indonesia in 1950, he was assigned a post in the Bukit Barisan command as aide-de-camp with the rank of lieutenant colonel.

He was supported by Golkar, Catholic Party, and the Nahdlatul Ulama fraction inside the Regional People's Representative Council of North Sumatra.

The council unanimously elected Sinaga as the regent of North Tapanuli on 12 December 1973, and he was inaugurated for his second term on 14 February 1974.

[1] During his first year as the regent of North Tapanuli, Sinaga faced difficult problems regarding to the infrastructure development in the region.

[1] Sinaga began his project for the infrastructure development by enacting land acquisition for tourism in Tutuk Siadong, Ajibata and Simanindo.

The Governor of North Sumatra, Marah Halim Harahap, promised Sinaga a trip to Japan fully covered by Harahap, while the commander of the Bukit Barisan Territory Command, Leo Lopulissa, promised Sinaga a Range Rover Classic.