Siwan is the district headquarters of Siwan district in Bihar state with the population of 3,318,176. The average literacy rate of Siwan is 72%. Lot of Educational institutions are found in Siwan. List of IAS Coaching Centres in Siwan. UPSC Aspirants can easily select the best IAS Coaching Centers in Siwan. To add your UPSC Coaching Center details in this Siwan page freely, please mail your information to firstname.lastname@example.org. We have listed the Best Civil service coaching classes and Top 10 IAS Training Institutes in Siwan.