Visceral leishmaniasis (VL) (Kala-azar) is a Public health problem in north areas of Bihar. To determine the prevalence of VL in Samastipur and Muzaffarpur districts and its correlation coefficient, educational status, work status, house hold characteristics, prevalence of house hold & living conditions. A total 3000 subjects of different age, sex group persons were examined. The prevalence of leisnmaniasis rural areas of Rosera, Bibhutipur (Samastipur) blocks (P > 0.01; P > 0.01) and Kurhani, Motipur (Muzaffarpur) Block (P > 0.001; P > 0.001) (t = 1323). The prevalence of VL was the highest in the 11–30 years age group and then decline than older (< 50) age groups. Prevalance of VL was some similar in Rosera, Bibhutipur & Kurhani, Motipur blocks of Samastipur & Muzaffarpur district, both sex and age groups in rural areas. Statistically significant (F – 10.22; P < 0.01) & the sex difference too was found statistically significant (F = 10.06; P >; 01) & there are more or less Similar trends in all 4 blocks.