Umarjhonka is a village in Kushalgarh tehsil in district of Banswara, Rajasthan, India. As per the data provided by Census of India in 2011, total population of Umarjhonka was 63 which includes 36 males and 27 females. Umarjhonka covers 33 ha area. Pincode of Umarjhonka is 327801.