Sangeet Verma, who is also a RSS volunteer, filed the complaint with the Shahpura police station here yesterday.
Verma has alleged that through his tweet, the Congress General Secretary had made a deliberate attempt to hurt the sentiments of Hindus, who have deep faith in Lord Ram.
Singh's tweet had mentioned about "Ram and Raghavji" and it was written a few days after the former State Finance Minister was arrested following allegation of sexual assault levelled by his servant.
The Congress leader had later claimed that his tweet has been misinterpreted.