Deara is a census town under Barasat II (community development block) (Sub District) in Barasat Sadar subdivision in North 24 Parganas district in the Indian state of West Bengal.DemographicsIndia census, Deara had a population of 11,994; of this, 6,018 are male, 5,976 female. It has an average literacy rate of 60.64%, lower than the national average of 74.04%.HealthcareNorth 24 Parganas district has been identified as one of the areas where ground water is affected by arsenic contamination.