The present work deals with the assessment of annual inhalation dose due to exposure of indoor radon,thoron and their progeny concentrations in the villages situated in sub-mountainous region of Jammu & Kashmir,India. The distribution of the data and the homogeneity of medians among different seasons and dwellings were assessed with the Shapiro–Wilk test and the Mann–Whitney test. The estimated total annual inhalation dose in these villages varied from 0.5 to 1.9 mSv year^-1 which is less than the prescribed limit by ICRP (2008). Thus, the investigated area is safe from irradiation of radon, thoron and their progeny.