In this study, measurements of indoor radon (²²²Rn), thoron (²²⁰Rn) and their equilibrium equivalent concentration (EEC) were carried out in 96 dwellings from 22 different villages situated in Hamirpur district, Himachal Pradesh, India, by using LR-115 type II-based pinhole twin cup dosimeters and deposition-based progeny sensors (DRPS/DTPS). The annual average indoor ²²²Rn and ²²⁰Rn concentrations observed in these dwellings were 63.82 and 89.59 Bq/m³, respectively, while the average EEC (attached ? unattached) for ²²²Rn and ²²⁰Rn was 29.28 and 2.74 Bq/m³. For ²²²Rn (f_Rn) and 220Rn (f_Tn), the average values of unattached fraction were 0.11 and 0.09, respectively. The equilibrium factors for radon (F_Rn) and thoron (F_Tn) varied from 0.12 to 0.77 with an average of 0.50, and from 0.01 to 0.34 with an average of 0.05, respectively. The annual inhalation dose due to mouth and nasal breathing was calculated using dose conversion factors and unattached fractions. The indoor annual effective doses for ²²²Rn (AEDR) and ²²⁰Rn (AEDT) were found to be 1.92 and 0.83 mSv a^-1, respectively. The values of ²²²Rn/²²⁰Rn concentrations and annual effective doses obtained in the present study are within the safe limits as recommended by the International Commission on Radiological Protection for indoor dwelling exposure conditions.