Article Detail Which is Longest Dam in India ? Answer: Hirakod Dam (Orissa) Similar Questions : 1. Which is the Densest populated State of India ? Answer: West Bengal 2. Which is largest Dome in India ? Answer: Gol Gumbaz (Karnataka) 3. Which is the Densest populated State of India ? Answer: West Bengal 4. Which is Largest railway route in India ? Answer: Dibrugarh in Assam to Kannyakumari in Tamil Nadu. 5. Which is longest river of India Answer: Ganges 6. Which is longest river in world ? Answer: Nile, Africa 7. Which is longest tributary river of India ? Answer: Yamuna Read more from - Longest and Largest