Laboratory-based soil productivity of apparent breeding sites of Phlebotomus argentipes and soil characterization was studied in a kala-azar endemic region of north Bihar. Soil samples were taken from human dwellings, cattlesheds and outdoor places. The soil productivity rate (SPR) of adult P. argentipes was calculated from each soil group. Physical and chemical properties of the soil samples were explored and correlation analysis was executed with the SPR for adult P. argentipes. Result showed that soil samples that were collected from goat shed was found to be most productive for the P. argentipes followed by buffalo shed, cowshed and human dwelling. SPR for P. argentipes established a positive correlation with the soil properties like pH (r=0.48, p= 0.00), Ca (r=0.32, p= 0.019), Mg (r=0.12, p= 0.359), K2 O (r=0.43, p= 0.00), P2 O5 (r=0.13, p= 0.850), water molecules (r=0.53, p= 0.00), sand(r=0.14, p= 0.30), and clay (r=0.47, p= 0.00). However, a weak and negative association was explored between SPR for P. argentipes and the soil components Al2 O3 (r= -0.14, p= 0.314), Fe2 O3 (r= -0.13, p= 0.345), N (r= -0.19, p= 0.114), and silt (r= -0.34, p= 0.03). Results of the study inferred that the abundance of P. argentipes depends to some extent on chemical and physical factors of their breeding places in soil