Sonaposi is a village in Majhgaon tehsil in district of Pashchimi Singhbhum, Jharkhand, India. As per the data provided by Census of India in 2011, total population of Sonaposi was 1,037 which includes 534 males and 503 females. Sonaposi covers 292 ha area. Pincode of Sonaposi is 833214.