Gusainsar is a village in Sridungargarh tehsil in district of Bikaner, Rajasthan, India. As per the data provided by Census of India in 2011, total population of Gusainsar was 4,924 which includes 2,544 males and 2,380 females. Gusainsar covers 8594.42 ha area. Pincode of Gusainsar is 331803.