Undangaon is a village in Sillod tehsil in district of Aurangabad, Bihar, India. As per the data provided by Census of India in 2011, total population of Undangaon was 8,752 which includes 4,493 males and 4,259 females. Undangaon covers 2199 ha area. Pincode of Undangaon is 431112.