Upper Fambong is a village in Soreng tehsil in district of West District, Sikkim, India. As per the data provided by Census of India in 2011, total population of Upper Fambong was 2,995 which includes 1,506 males and 1,489 females. Upper Fambong covers 417.95 ha area. Pincode of Upper Fambong is 737121.