Chaiyan Chak is a village in Garhani tehsil in district of Bhojpur, Bihar, India. As per the data provided by Census of India in 2011, total population of Chaiyan Chak was 1,646 which includes 848 males and 798 females. Chaiyan Chak covers 35 ha area. Pincode of Chaiyan Chak is 802203.