Katahia is a village in Majhaulia tehsil in district of Pashchim Champaran, Bihar, India. As per the data provided by Census of India in 2011, total population of Katahia was 5,833 which includes 3,032 males and 2,801 females. Katahia covers 410 ha area. Pincode of Katahia is N/A.